I agree that we don't want another commander unit to manage, but there has to be some way to make Division commanders more meaningful. They were some pretty colorful and important characters historically, and quite a few also were killed or wounded in combat. In the game they do almost nothing, and the divisional organization has no real meaning in actual gameplay terms apart from the command stats. The division commanders also don't get any interesting perks/bonuses.
My personal recommendation would be the ability to assign the division commander to one of the brigades in his division. Then that brigade plus every other brigade in the same division within a certain radius would get some minor buff(s). You could have a small pennant or something to indicate which brigade the division commander was with, and maybe you could re-assign them during the battle within a short distance or with a certain time delay. They could also be killed/wounded if their brigade took casualties, though maybe with less chance than the brigade commander. It would make the division commanders present on the battlefield and give more meaning to the division organization, while at the same time not adding another unit to be managed.
I also agree it would be really great if somehow the corps/division identify of brigades was more visible.
