I think general uniform overall should stay the same, but you should have options for hats (different depending on regiment or brigade), as in if you were 14th CT, you could wear a slouch hat or kepi. If you were playing as a regiment in the Iron Brigade, you could have the Hardee hat as an option. Same goes for weapons for certain regiments. As another example, I will again use the 14th CT, who used both Sharps rifles and Springfield muzzle-loaders, so having that choice would be nice. I also really like the idea brought up earlier about hat positioning on the head!