I’d like to ask one thing, what do you mean by Orthodox person accepting Rome and Catholics as orthodox being sufficient to consider themselves Catholic? Wouldn’t they still be subject to preaching against Rome and not praying for the Pope in Divine Liturgy and so on? While I believe they would be considered Catholics, I also think they should find some Catholic Church (if possible, of course) too, to live full spirituality IN the Church
If someone is an Orthodox Christian, and they have accepted in their heart that Rome is Orthodox and they consider the Holy Father their spiritual Father, there is no need for them to leave their Byzantine Orthodox Church and become Roman Catholic.
We are already in a spiritual, sacramental communion with the Orthodox, but we lack full visible communion. But if an individual Orthodox discovers the fact that Rome is orthodox and reconciles in his heart to the Holy Father, it is enough. There’s no need for him to leave his Orthodox community and “convert” to Catholicism, since he’s already in a Catholic Church.
The Orthodox Churches are fully valid Catholic Churches. They exist, as a confederation of Byzantine Rite Catholic Churches, in a state of material schism from the rest of the Church in visible communion with the Holy See. The individual Orthodox who has reconciled to the Holy Father in his heart but who wants to remain in his Orthodox Catholic Church can do that in good conscience.
I’d also argue that for the sake of the Ecumenical movement, we NEED people who have reconciled their hearts to the Holy Father to stay put in their Orthodox Churches.
If every individual Orthodox who discovers Rome’s orthodoxy leaves the Orthodox Church and becomes Roman Catholic, then the Orthodox Churches will be in perpetual schism because only the anti-Catholic Orthodox will ever remain. We need the number of Orthodox who are reconciled to Rome in their hearts to outnumber the Orthodox who are anti-Catholic if our Churches are ever going to reunite.
I’d also say that an individual Orthodox who reconciles to the Holy Father in their heart should not become a Uniate/Eastern Catholic either… Both the Catholic Magisterium and the Orthodox have agreed that Uniatism is no longer acceptable. (Not saying Eastern Catholics are unacceptable - I’m de facto an Eastern Catholic myself… I’m saying Orthodox “converting” and becoming Eastern Catholics is redundant and actually counter-productive in the grand scheme of things.)