I must say that I like this mod much, but what I hate is economy in this mod:
i don't like money scripts - small factions were vulnerable, but in my games if i don't destroy a faction nobody does - is it realistic?
AI is capable of completing some (maybe all) buildings just in 1 turn - so it enables elite cathapracts to be recruited in turn 20 (Pahlava with 3 regions can swarm me with cathapracts early in the game), all AI factions can build type 1 government in 1 turn
why should sea trade mostly depend on distance between cities - Alalia can become one of the wealthiest cities only because italian cities are near - the shorter sea trade route - more money you get, it is not important that there are deposits of gold, silver or you can find silk or spices in that region but the distance is too big (I know it was difficult to clear trade routes of pirates, but cities like Alalia, Mytilene or Chalkis shouldn't be made the most prosperous)

all in all - EB is about realism but not in economy - but in EB2 this can be easily changed (in M2TW and especially Anno Domini mod - trade depends mostly on resources found in regions and population - if there are gold mines in a region it will benefit also from trading with gold, if there is only tin in a city - it won't make much money from trade)

I know it is hard to implement realistic economy in any of games, but you should focus on economy of Anno Domini mod