So far, my one real complaint is the reportoire of songs is minimal. You should add many more songs from the era; hopefully enough that you hear Southern songs when you play the Confederacy and Northern songs when you play the Union.
There is something a bit disconcerting about finally getting McClellan to move and then listening to When Johnnie Comes Marching Home as he does.
PS: You should also include a free alarm clock in the box so you don't cause us all to miss work staying up all night playing!