RE: Church Unity
Peter, as mentioned previously in is post, these issues would all need to be addressed pre-reunion.
Tha matters of Roman Practice would certainly be addressed with regards to their doctrines but other matters would probably be left to Roman discression to be seen as a local practice. With regards to Liturgicl practice, key elements and prayers in the Roman liturgy come from the St James and much of it I recognise from our own practice. Even within Orthodoxy many elements in Liturgy have been adapted so we can admit Apostolic and Patristic origins in our Liturgies but not to use a completely Ancient Liturgy.
Either way, union between Rome and the East is looking unlikely for the time being so yu can hold your breath.
"The true Christian is a warrior making his way through the regiments of the invisible enemy to his heavenly homeland." - St Herman of Alaska.