My primary objection is that, with the exception of baptism, the Church does not permit ministers that are outside of the Church to validly/licitly administer her sacraments, period. Any more than She permits her ministers to administer her sacraments to those outside the Church.
I don't think we see eye-to-eye on what exactly the Church's "permission" means. You are correct that the Church does not "permit" non-Catholics to administer the sacraments (save for Baptism in danger of death, and
possibly EO priests confession in danger of death). We can even say the Church forbids, condemns, proscribes, etc. all other usage of the sacraments concerning non-Catholics. But what the Church
doesn't do is declare them invalid, so long as proper matter, form, and intention is present. And there is a reason for that
Otherwise the next thing you know the prots everywhere will be hearing/going to confession, ordaining priests, administering the Last Rites, consecrating hosts etc. all claiming validity because they use Catholic sacraments. They would defile the sacraments to no end, which of course is no way to preserve and protect them.
But this is exactly what the Orthodox have been doing for 1000 years. All illicit and mortally sinful. That cannot be pleasing to God. But the Church has never declared their administering of baptism, the Liturgy, chrismation, holy orders invalid. I would think if the Church had a way to prevent this from happening, besides forbidding, condemning, etc., She would have done so.
If you are going to say that the Church just "permits" the EO to have the Sacraments because She "trusts" them, you will also have to explain then why the Church "permits" Protestant baptisms to be valid..even those administered by heretics
to heretics (adults). That is illicit, and both parties sin mortally and commit sacrilege. That is the definition of "defilement" of the sacraments. No grace is received through it! If the Church could simply "invalidate" these baptisms, why wouldn't She do so? Why not permit baptism in cases where it would be licit (e.g. danger of death, recipient professes the Faith and wishes to be baptized into the Church), but declare invalid those baptisms of adult heretics, where it would just be sacrilege?
We all know that the Church is the sole owner of the sacraments, she is the only one who makes the rules governing their use, rituals, etc., because they're hers and nobody else's. She is the only one who protects and has preserved the sacraments, which are absolutely necessary for salvation, since the time of the Apostles. So while I accept the EO are in schism, I also trust Holy Mother when she trusts the EO as she trusts her own ministers to not defile or abuse her sacraments.
Except the EO
do abuse the sacraments every time they administer them. It has been 1000 years of illicit, mortally sinful sacraments from them. They administer them and receive them against the Churches law, in mortal sin. That is sacrilege.
The sacraments are the Church's because Our Lord divinely instituted them and entrusted them to his Mystical Body. You will agree what the Church cannot do is "mess" with the sacraments. The Church has no right to change the form and matter, because they were divinely instituted by Christ, not the Church.
So, those heretics/schismatics who administer baptism, holy orders, Holy Eucharist in the way Our Lord instituted, with the intention at least of doing what the Church does..the Church has no right to declare these invalid. To do so would be to change what Our Lord once declared. But She can, and does, declare them illicit, condemned, mortally sinful, etc.
So on that account, we can argue that the EO are still in some way, some how connected members, even though I personally do not believe they are members, I believe they are definitely outside the Church, but there's an argument that can be made that their schism did not sever them completely from the Church - because She gives them permission to use her sacraments. It's tough for me to swallow, but it is what it is and I accept it because Holy Mother says so - good enough for me.
The Church does not give permission to the EO to use the Sacraments. The EO do so illicitly. They "steal" the Sacraments of the Church. The Church actual condemns these sacraments, but that is all She can do because they are still valid. "Giving permission" but also declaring the sacraments illicit, mortally sinful, etc. cannot coexist
I'll respond to the rest later