This is the first feedback of the mechanism.
Unfortunately I'm unhappy with the result. I was playing as Rome and run pantheon.
Orthodoxy was autofounded before I conquer Jerusalem and Catholicism was founded by me some turns later.
I propose these changes:
*If Rome is alive, no autofounding for Orthodoxy. Rome and Greece will beeline Theology, or Byzantium will found it on spawn.
*If both Rome and Greece are collapsed let Byzantium spawn and found Orthodoxy.
So Orthodoxy will be founded by 320AD.
*Catholicism can be founded only by the first mechanism, by building Cathedral.
*Before Catholicism, all catholic civs try to build the Cathedral.
So Catholicism will be founded by some euro.