I've played your mod as Byzantines and encountered few bugs.

Byzantines can train Champion Swordsman, but it requires Tournament Fields they may not build. I thing, that disabling CS for Orthodox would solve it.

In Crimea population percentage of faith if counted together exceeded 100% by far. In other province (I cannot recall it's name) it was 100% Christian AND 100% Pagan.

If I have ship in some region and it borders with land, I can see units (I mean detail view, not only bar shoving number of units in fortress ...) and buildings in this province until owner of this province doesn't send ship to that sea? Is it right? I think, so.
I'm asking because I (and only I) had ship in sea neighboring with Sahara (I'm not sure with name, it's province disabled in MTW and enabled by your mod) and I couldn't see units and buildings in that region.