I list some suggestions and i update when i think of more
1.A skin for the rifleman Colonel/Major/Lieutenant so we can easily distinguish just like in NW.
2.Adjustable chat, for me personaly its too small.
3.Voice line UI, currently its hard to quickly find the right voice line so maybe a command wheel with branches [ship] [army] [arty] [cav].
4.Melee while crouching, this should come with the Cav update hopefully
5.Team Chat (its just silly when you plan tactics and the enemy simply reads them lol)
6.Bullet Drop... its just too annoying to aim above them with crosshair when they above 40m away plus the random bullet direction.. i rather hit more but deal less demage at range..