One thing I always thought while playing GC: It would be cool to be playing on a ground combat map with a corvette or somthing flying over the battle providing support. Maybe there were no capital ships on ground missions for scaling reasons? If Capital ships were on ground maps, they could spawn ground vehicles in their hangers that could be transported to the surface by a lander. Having a feature like this could add an interesting invasion situation. One side could spawn on a  small fleet above the surface, while the other side could start on the ground in a heavily fortified position in control of every CP, without any capital ships. A capital ship without hanger space for a lander could land itself and lower a ramp for ground attack vehicles to disembark. This would place the ship in a vulnerable, but very controlling position.