Hi!
I understand you very well, I'd like to bring more differences to the game fractions myself. I has a few ideas about that. BUT...
We don't have pile-up interfaces or anything like that where we can show that this warrior does 30% more damage than another warrior, but let's say he does slower. However, the battle itself is quite intense, and the players just don't notice many details. For example, if your warrior will run faster than the other warrior or have less health? If the barracks will produce warriors faster? Will it be noticeable at all?
Can you tell, with the current balance, how much health your buildings have and how much damage your warriors do?
We had a few iterations of the distinctive features for different factions, but they all tripped over the impossibility of expressively showing and explaining it, so as not to overload the game too much. We also experimented with different mechanics for different races, it's like snowball generates too many problems at all levels.
In the end we just came to the conclusion that the game is good in its simplicity. It's a kind of chess where it doesn't matter what color of pieces you have, but it's important to use them properly.
For justice's sake, special landscapes affect factions differently.