A few playthroughs in, finished Antietamn as confederate for second time. Playing on easy difficulty and won all battles. Great game so far, but there's a few issues. In the last battle I had 60k against 120k(and about 250 vs 400 guns), and caused 80k losses while suffering 25k. This is pretty standard for all the battles, unless I outnumber the enemy in which case they are more. There were a few battles where I lost more as well.
The main issue is that the game seems to be all about big units. This is because creating massive brigades allows you to charge and outpower any opposition. I broke Malvern hill with five 2500(0r 2k?) men strong brigades. Accidentally captured another VP because one of the units routed through the enemy line. It's the same issue with AI, because when it has those massive 3k men brigades it just concentrates 3 or 4 and breaks any unit on its way. Unless you have those same big brigades as well. The charge system is a bit broken.
The hand to hand fighting at the moment is like some massive brawl, whereas it should probably be more like pushing in a line; there should be a frontage. This would mean that you cant just attack 1000 man brigade with 12 000 infantry, because those 12k will be blocking each other. Unit get in melee too often anyways. Sometimes the AI routs nearby and the whole line explodes because the routing unit catches one unit in melee. Cavalry charges are way overpowerd, at least when timed correctly.
This usually leads to a strategy where I shoot the AI units to pieces, then charge and break them. Like I said 3 to 1 casualties are the norm, each brigade usually lasting 3 battles before it is down to 1000 men. Usually I just keep creating new units until the whole corps is spent(and has also become veteran), and then create a new corps. For the major battles I beef up as many veteran units as possible, all at least to 1500, and usually try to create one massive corps of raw recruits. The veterans then take up as good defensive positions as possible and aim to whittle down the enemy units from 3k to 1.5k men. Usually this happens because the AI gets stuck in the open. I also have quite a lot of artillery, as one 24-gun battery can cause 2-3k casualties per battle. They cause supply issues though. One the AI has broken it's units I bring in the big units, if any remain, and rout the enemy. This is quite repetitive though...and for example there is no other way to break Malvern hill than massive brigades because my 1.5k veterans cant defeat a 3k fortified enemy brigade in firefight.
Campaign could use a big makeover. Scaling doesn't work at all. At the start of each campaign phase the player should see the composition of enemy forces, and all the small battles should have an effect on it(and perhaps give other perks as well). Even better if several campaign were linked. Instead of just giving the AI random units for each battle give it an OOB that unlocks gradually. On top of this after every grand battle the AI should get an x number of men, money, leaders and weapons. Even better if you can let player decide how much(or link to difficulty). The prebuilt oob could start at whatever nominal strength, and the AI could then rotate corps throughout battle. This way if several corps with 3k brigades get shot to pieces it will at least eventually run out of men, yet still retain lots of small brigades.
Also, asking stuff from government should be at least half as cheap.
Early access so I am sure lots will improve.