My own thoughts being mediocre as they are, a recent talk given by a Greek priest, Theodoros Zisis, who is also a professor of the Theological School of the Aristotelian University of Thessaloniki gives even more substantive weight to my thesis that the Unia present real problems of dialogue and (re)union with Rome. I particularly like this statement:
Unity is not achieved by 'uniting the churches', but rather through 'union with the Church'.....
And that is the problem. We talk so much about uniting churches of such dispareate theologies, ecclesiologies and praxis that what we have is nothing more than an amalgam of traditions with competing claims as to what is Christian. Such a cafeteria of confessions only poses more problems than what it supposedly solves!
You can read the rest of Fr. Theodore's thoughts on this subject here.