Targeting options on turrets / weapons (for instance targetting the closest target or targeting the most dangerous)
Group formations & custom formations (having troops line up in formations where for instance, the tougher units are on the front line and the long range units stay at the back).
More unit (bot) diversity and / or diffent controllable races (with different modular component sets & buildings) would be nice.
Make "braawler" units (with close range attack components) more viable as well.
