So I've played through Stones River a bunch of times, one of my favorite battles in the game. But there are some significant issues with it that I think would be easily fixed:
1) A bunch of fords were missing. I thought this when looking at the in-game map, then I went to Stones River battlefield in person on a trip to visit family nearby, and walked the area and talked to the park staff and confirmed that there were in fact passages where I thought there were at the time. There is one in particular that would make a big difference to the battle, which I've attached a picture of. Based on research I did, that one was a major factor in the battle, and every time I've played the battle I've wished it were there.
2) The Northern side/Murfreesboro - this battle was fought to get at/defend Murfreesboro, and there was a lot of maneuvering and fighting on the northern side of the river. In the game nothing happens over there. I would suggest adding a victory point to the Confederate defensive position or to the woods behind it, to encourage the Union to make a counter-attack there. Because as it is a huge and decisive part of the historical battle doesn't even have the potential to occur.