I have a suggestion for the SP part of the game:
Please add a pause mode in which we can give orders to our troops, just like in the Total War games. This way we could use the special abilities of our units much better and could plan our tactics better and even could enjoy the battle more (at least if you're no fast-playing RTS core-fan....)
I know that this is impossible for MP but I think there wouldn't be harmful to any extend to add this possiblity to the SP mode.