Unity, through subsidiarity?

Is it possible that the solution for the "Union of the whole Church" can be solved through the principle of subsidiarity...

CCC 1883 Socialization also presents dangers. Excessive intervention by the state can threaten personal freedom and initiative. The teaching of the Church has elaborated the principle of subsidiarity, according to which "a community of a higher order should not interfere in the internal life of a community of a lower order, depriving the latter of its functions, but rather should support it in case of need and help to co- ordinate its activity with the activities of the rest of society, always with a view to the common good."<sup>7

That is to say, instead of looking to Rome to solve every issue at hand, that the local churches can make moves in that direction (certainly get ratification from Rome)..

Let me give an example: Say the Ukrainian Orthodox and Ukrainian Catholic Church come to an agreement on the recognition of the papacy and the issue of jurisdiction which separates us and they sign a deal expressing full communion with each other. Because the Ukrainian Catholc Church is already in Communion with the Roman Church, by extension the Ukrainian Orthodox would be in communion with the Roman Church, problem solved...Why could this not work? It seems to me it'd make more sense for the problems to be dealt with locally versus at the higher level.

The same situation for the SSPX...Could this not be solved on a local basis? Could not the Bishop lift the suspended A Divinis status (through permission of the Holy See obviously)...and grant faculties this way? Would it not be simpler this way than to go through all of the hoops and semantics that seem to be going on now? There are a few Cardinals who would be open to the SSPX running their seminaries...why couldn't it be solved on a local basis? 

Sometimes, I think there is an type of Idolatry towards Rome as if they're supposed to do everything...Could I be wrong?

Pax Vobis</sup>