EENS is in fact a perfect example of the problem. Yes, there's EENS. But there are dozens of "interpretations" of EENS.
The literal reading of a dogma, as the literal reading of the Bible, has always been the "general" rule on how the Church tells us to read such things.
It's not enough for there to be dogmatic definition.
For many dogmas, the definition suffices and no re-interpretation was necessary. For EENS, you're correct, the devil won't let that one go, so he keeps attacking it.
There must be ongoing interpretation and also the correction of mis-interpretations.
For EENS, yes, there must be on going interpretations ONLY because of ongoing attacks. Some dogmas were defined once and it's settled.
In your vision, short of a new follow-on dogmatic definition, there's no reliable authority in the papal Magisterium to be the authoritative interpreter.
Yes, the pope is the only authoritative interpreter. If the pope uses his magisterial authority to interpret, that is typically done using a dogmatic definition. The other way, is if a pope uses non-solemn dogmatic decrees to authoritatively re-teach something (i.e. when JPII re-taught that only men can be priests.)
But...if the pope uses neither of these 2 modes of authority, then his interpretation isn't authoritative, by definition. There is no such thing as a non-authoritative authority.
But honestly, I need an example from you to better understand.
Some things have been decided by past papal Magisterium. But who cares? In your warping of the Catholic Magisterium, those papal interventions could have been wrong, and there's no reason they can't be criticized or reject short of when it was done by way of solemn pronouncement.
I've never said this. You're misinterpreting my arguments.
When Pius IX condemned religious liberty, he could have been wrong. Vatican II could have in fact been correcting Pius IX's mistake. You have absolutely no way of knowing.
The point is, Pius IX's condemnation (while not solemn) is in line with previous papal condemnations. Thus, it's traditional. No one ever claimed Pius IX's actions were novel.
V2 is condemned on the simple basis that it's novel and contradicts previous popes.