no wait ... ahahah, i voted now !
regiment should be the minor formation aviable, more regiments form a brigade.
single regiment, as unit, is too important for the war/period.
each regiment has its colours, his history, his men, his come from land.
simplify is trivialize.
i hope much more types of units, differents half uniforms for confederates, zuavis, yankees with hat tipical of the regiments which come from Wisconsin, or of the iron brigade ...
anyway to make it short, i think the main points should be :
Unit Formation Line, Double Line, Skirmish, Column
Detach Regiments from Brigade
Modding
Sandbox Mode, Scenario Generator
this last point needs to the game to be remembered and not just plaied in a couple of months, but you know !
AI is perfect, not the game (and isn't few ...)
about on-line, don't expect nothing by me about, i mean, i never did and i can't play multiplayer.
then, i saw a great and unique game like american conquest dead on-line because basically multiplayer game (scandalous to play it in single player)
ciao