This has been bugging me for awhile, but now that I have been reading Shelby Foote's work I'm even more bugged. I'm sure this has been mentioned before, but I couldn't find a matching thread. I know many of you will already be familiar with this information, but please forgive a student.
It has to do with the generals, when/if they appear, their rankings, and the limitations imposed by the game as a result of the ranking system.
First, I'm really glad that the development team has expanded the list of leaders from the previous game, and I think even increased the number of leaders in CW2 since patches have been made available. I appreciate and enjoy the work that's gone into flavoring the game with those and their portraits. But there are several significant leaders who don't appear, or appear as general officers at wrong times. You may say they are minor figures (T.R.R. Cobb, William Barksdale, etc). However, there are already several minor generals who appear; some who lasted only as long as Barnard Bee, or who had little impact on the battlefield outside of failure, like John Floyd.
... and what's the deal with Floyd, anyway? On the Union side, Patterson is removed within a few months as per history. Floyd was also removed from command by presidential edict, yet I have to tuck him in some out of the way stack in the swamps of Louisiana for the entire game ...
As far as the ranking system goes there are several examples, but the first one in CW2 that I'll mention is Nathaniel Banks who, according to the sources I've read, never reached the rank of lieutenant general. Now this is a piddling detail, if you consider leaders such as Quantrill who only styled themselves as generals. But still, it bugs me. Maybe there ought to be a different level of "army" at the major general level, with reduced effectiveness? I know this would entail a major redesign, but I think it would go some way to helping achieve historical accuracy.
There were "armies" on both sides of the conflict that weren't commanded by 3-stars. On the Union side, the first Army of the Ohio was formed under a brigadier and led later by 2-star Buell and later 2-star Rosencrans. 2-star Van Dorn's Army of the West at Pea Ridge is a CSA example. Maybe a 2-star army could function like an army stack, but provide fewer base command points and/or not allow corps formation. I don't know what you might do to prevent having a couple-dozen 2-star armies running around, other than perhaps limiting formation to leaders with a certain minimum seniority level. But given that seniority can be negatively affected I don't know if that would do the trick.