Well then, for those curious about the scaling overall while in vanilla Confederate campaign on max difficulty it stops working (enemy starts to bring significantly less troops than it previosly could) when you kill around 1 million yankees in this rebalance mod it stops working when you kill around 2,5 million yankees in the same campaign on same difficulty.
I tested it with cheating myself manpower, money and perk points by cheat engine and right before Cold Harbor battle yankees essentially broke their neck. (Could do 2,5m kills sooner but preferred to use somewhat garbage guns my troops could hold on)
Other important note, imho, game maps are not suitable for 6000 max divisions, they are too huge for those tiny maps. Both the enemy and myself found troublesome to navigate those huge stacks around. It could be somewhat worked out with vanilla snipers but since this mod rebalances distance of fire for most of guns towards 400 it was horrendous. Entrenched troops are even more overpowered since they take less space and as per usual game bug those troops located on the same spot can shoot too. Counter-battery fire starts to play significant role and if not for retarded AI sometimes seemed to wanting to charge his artillery into melee his artillery would be quite frightening thing to behold - for the same reason, maps are too small for the enhanced battles that the mod is providing.
(Also, more available for participation in battle brigades rarely leads for game engine to crash itself when it has too much info to calculate on and the only two solutions were to move less troops around or even take less brigades than possible for the battle to get rid of this problem..)
The one bug of the mod I found hilarious is that if you are given allied troops in the battle and they are divided into several smaller ones by the mod's script while the original brigade was entrenched - those several brigades are entrenched into the same trench, lol.