There are a few issues I have encountered with this mod that i must point out. For both in-game and installation.
I'm playing the version IS 2.2.1b with the Battle Realism submod.
Installation Issues:
The mod only loads when i set the launcher shortcut to run in Windows 7 compatibility mode. Otherwise, it will just load the vanilla game with reskinned UI, British and French kings. I am using Windows 10.
In-game issues:
1)Unit costs
Since the unit costs are so high, no one have enough money to muster anything, this slows down the gameplay a lot. It bored me.
2)Building costs
Same with the unit costs, I'm playing as the British. Having the 13 colonies at the start of the game is a plus, but how come the tax income can't really cover the building costs effectively. I ended up waiting for so many turns to build something.
3)Unit firing accuracy
I know guns in this period is really terrible in terms of accuracy, but my men can't hit anything at point blank range, cause the enemy unit will end up marching straight at you in a blob. When the enemy unit touched my units ever so slightly, they ran away and started routing. I will talk about this in the next point, but I have seen so many times when the enemies are a few meters away from mine, none of them could hit anything anywhere, as if everyone was blind or they brought toy guns to fight.
4)Units AI
As mentioned, the enemy units will just march up to my units, touched them and started routing, I haven't a clue why do they even tho that. This is even worse than vanilla AI. My units are also very stupid, they would rout when they just shattered an enemy unit because being exhausted. If the aim of this mod is realistic, this kind of AI is immersion breaking and unrealistic.
Conclusion
I'd rather just play EU4 than coming back to ETW playing this mod. The unit designs are cool and the uniform upgrades are interesting. But the bugs are so immersion breaking, I'd never play up to the point to research new units to unlock new uniforms. Every battle is stupid to the point that is laughable.