Just found the mod after a long leave from Total War. Very good job, just what I always wanted! (maybe level 5 settlements to barbarians, but that's pretty much it.)
Thrace: I always liked them, a very unique mix of greek and barbarian units. However, they are usually the first to be destroyed, so I don't mind if they are removed.
Ideas:
I always felt that the AI is incapable of defending factions, which are "set up to blitz". As a human player, the start position of Gaul, Greek cities and Carthage makes it easy to rapidly expand in multiple directions. But the AI is incapable of defending a spread out realm like this.
Therefore the idea would be to split one of these into two, to make a more compact realm easier to defend for the AI.
a: french and northern Italy gauls as two factions
b: greece: syracuse + other
c: carthage: spain+mallorca (maybe corsica) vs. northern africa+sicily+sardinia
Otherwise there are not many blank spots on the maps, maybe with the exception of the far north. (the amazons
)