Gentlemen,
First, well done. This is going to be a brilliant game, years of replays lay ahead. I see where you're going and I like it immensely.
You asked for feedback, this is it. Playing this for exactly one weekend, knowing a bit about the war and this genre, this is what stands out to me:
UI needs to be simplified. Maybe you could color code commands. Right now it's difficult to discern what a unit has been ordered to do.. Example: 'Charge' needs to expire when a unit reaches a state of exhaustion. It doesn't, and It is difficult at this point for a new user to tell if the charge command is engaged or not.
Players should be allowed to specify whether a unit marches in line or in column.Additionally, there has to be an easier way to make a division of troops fresh to the battlefield march down a road in a more logical fashion.
Players should be able to specify artillery rounds. It is hard to properly site batteries when you cannot fathom to the range of specific munitions.
The campaign game's army creation tools, the way you've layered it, is kind of brilliant. It makes perfect sense when you understand it, but it is not easy to figure it out at first glance.
Again, Great Job! Please keep it up!
For future reference, what is the general policy suggestion for providing feedback?