I have been playing the game for quite some time and have aqcuired a fair bit of experience, I have recently picked up the faction called Arche Bosphorus, which I absolutely loved.
However, there are a few problems with them that should be fixed, note that those problems are not problems that bother my personal gaming experience but those are problems that impair the gaming experience of the faction itself.
Garrison:
AB has a maximum of 5 garrison units, these units are all basic units.
No ranged units are garrisoned.
The amount of units decreases everytime you upgrade a barrack, town or temple, down to 1 unit from the town.
Units:
The elite hoplites (Bosphoran Thorax Hoplites) are simply useless, after checking their stats they should be the strongest units around there. However, after testing them again another melee unit with spears, they get destroyed after having made 5 kills tops. These are golden ranked lax upgraded hoplites. I have tested it and they make less kills than the syrian archers in melee mode.
The text above applies to theBosphoran swordsman too.
The recruiting of units is completely messed up, I cant recruit any hellenic units in the towns I capture,'although they have around 60% H culture.

Do note that I am around 200 turns in my 2nd campaign with them, I have played in hard and normal and have compared the stats and problems with other nations.