Clearly individual Catholics are being blessed through Tradition.  My belief is that the Church will not return to Tradition until the Triumph of the Immaculate Heart.  God wants the world to know the victory is His and is given solely to His Mother.  He wants it to be acknowledged as a purely supernatural event, not the work of human hands.

For clarification, that request was never granted. This fact eventually resulted in the episcopal consecrations. Also, Tradition is not limited to the SSPX. Unfortunately the newer generations born into the SSPX are not aware of it. Back in the 70's not every traditional minded clergy agreed with AB Lefrebvre's position and are still around independently.
Regarding the scandals, trads leaving the faith, etc. it's men, not the institutions themselves, who make the choices. When Superiors take the wrong path,  institutions fall. Not the Catholic Church because Our Lord is the head.

Nothing was mentioned regarding the SSPX, only that the request was made.  The question is independent of any Trad group or Society.  The official request was not granted, correct.  But Tradition continued as well as the graces that go with it.  If Tradition was truly Gods chosen path for all souls to get to heaven, why has it not flourished?  It does not seem to be much different than other Christian groups, in terms of statistical growth.  And the ratio of perverted priests and administrators to the number of faithful seems to be equivalent.

Not what one would expect for Gods chosen religion.

Nothing was mentioned regarding the SSPX, only that the request was made.  The question is independent of any Trad group or Society.  The official request was not granted, correct.  But Tradition continued as well as the graces that go with it.  If Tradition was truly Gods chosen path for all souls to get to heaven, why has it not flourished?  It does not seem to be much different than other Christian groups, in terms of statistical growth.  And the ratio of perverted priests and administrators to the number of faithful seems to be equivalent.

Not what one would expect for Gods chosen religion.

If you spend all day on news sites, you would be under the impression that "it's as bad as the N.O.!" But no, it's just a couple of cases. And at the very least, it's very easy to avoid such "traps" if you keep your eyes open.

In the case of the SSPX, there is indeed a corruption at the top and the entire leadership -- but I've already said that the SSPX fell when they left Tradition to try to please the world and become the FSSP. So strictly speaking, they aren't Trad anymore. Not as an organization. Perhaps a few priests are still Trad in their thinking; certainly in their training.

But the SSPX leaders no longer believe in the Traditional movement. They think it leads to becoming "Old Catholic" if pursued for too long. I'm not making this up. These were their own words. They think "Traditional Catholicism" has a firm expiration date which must not be exceeded; and that time has passed. So they now seek to be literally Indult instead. They seek permission (an Indult) from the Conciliar authorities in Rome. This is not something Traditional Catholics did -- or do.

I agree with Yeti. In other words, trad people condem themselves, by their own fault, not because of Tradition. The general apostasy was foretold.

the majority of children raised in Traditional Catholic homes do not retain the faith.  Hence, the “Experiment of Tradition” has failed, with very little statistical difference than the Novus Ordo.

This is simply not true.

The "majority" of children? seriously? If it's true that some families do a horrible job living the Traditional Catholic faith, and passing it on to their children (by WORD and EXAMPLE), but that isn't an indictment against the Faith! Quite the contrary.

Firstly, let's not mince words. Traditional Catholicism is just Catholicism minus Modernism. So basically "Catholicism".

This argument is as old as the hills. "If Catholicism is the true religion, why are there so many shi lousy Catholics? Why isn't every Catholic a saint?" It's not the FAITH that is to blame in those cases, but their rejection of the Faith, that makes them crappy. It's not that Catholicism is deficient or inadequate to make Saints -- but you have to DRINK from the stream to receive its benefits. Throwing someone into the stream doesn't force them to drink. You can lead a horse to water but you can't make him drink.

No religion, including the True Faith established by Christ Himself, takes a hold of people and violates their Free Will. It doesn't work that way.

Lastly, the statistics in Tradition are *nowhere near* those of the Novus Ordo. Whether you look at Mass attendance, knowledge of the Faith, etc. *all things being equal* you have much better chances attending ANY Traditional Mass chapel over just about ANY Novus Ordo parish. The two aren't even in the same league.

Long story short, the only indictments against Catholicism -- I mean Traditional Catholicism (same thing), are ANECDOTAL. Individuals using their Free Will. You show me a few families that did a horrible job raising their kids Catholic? I can show you some successful families that used Tradition with great success. So to resolve this stalemate, you have to look at Traditional Catholicism INTRINSICALLY. What is it, what does it teach, SHOULD it work, HAS it worked, etc.

If every failure of Tradition to produce Catholic kids is because parents send kids to public school, let them have smartphones (and porn that comes with that package), lets them hang around non-Catholics, etc. -- how can you blame Tradition for that? Nothing in Tradition says "send your kids to public school", "let your kids be on Social Media", "let your kids keep bad company with non-Catholics". Again, quite the contrary!

Tradition doesn't tell parents "You're sending your kids to a private (SSPX) school? You're good to go! Go, waste hours a day on the Internet, TV, video games, spend lots of ME time in your man cave. You don't need to teach your kids the Faith, or prepare them for battle with the godless World..." 
...but many do this anyhow.

Those failures are because of the parents' choices -- not the rules, substance, essence, or culture of Catholic Tradition. So this isn't a "no true Scotsman" fallacy. Anyone can call themselves Traditional, but if they reject everything Tradition teaches, are they really Traditional?

I don't think it's "up for grabs" whether someone is a Scotsman, a Catholic, or a Traditional Catholic. If you reject the Fifth Commandment, you are a material heretic, so technically not Catholic. Joe Biden, supporting Abortion, is therefore a material heretic at least and can't be considered a Catholic in his support of abortion. He does that on his own volition and not AS a Catholic.

This is simply not true.

The "majority" of children? seriously? 

If it's not a majority, then it isn't too far short of that ... just from my own anecdotal observations around various chapels I've attended.

There are no Traditional Catholics known for heavenly apparitions ...

... and if there are any among the Novus Ordites, the vast majority are just plain frauds, and some under diabolical influence.

God has chosen to withhold such miracles/apparitions in these dark times, just as He's chosen to withhold the light of the Church from the world as well.  God wants souls to be sifted and to navigate these days by sheer faith, without any sensible consolation, as it were, to make an analogy with spiritual dyness.  If you had someone of the caliber of a Padre Pio endorsing Tradition, the Traditional Catholics would outnumber the Novus Ordites ... since he would draw them to the truth.  But God doesn't want that, people drawn by signs and miracles and wonders, this wicked generation that seeks a sign, as Our Lord said in His day.  It is in this way that faith is actually strengthened, when it isn't reinforced by outward signs or evidence or demonstrations.

This individual mentioned by the OP has weak faith indeed.

If someone can't tell the difference in faith, devotion, and piety at a Traditional Mass vs. what you see in the NO, then he's blind, and willfully blind.