I like most of your Ideas. he onyl one I do not agree with is the droid factions. It would be extreamly difficult to animate a small squad of droids to look realistic. Since you would be turning and things as if it was a vehicle, I just dont see a possable way to do it.

I also dont think there should be any big deployable things. Like spawning a ship, or building would be fairly unrealistic. It would be pretty cool though if there was a "constructer" unit, who can choose his deployable items in the weapon choosing screen. Perhaps mounted repeater turrets, and tented camps like you said. I also think it would be cool to have something like bright beacons for night maps. Like you plant beacons to let your allies know were you are in the distance, or to distract your enemies. But I guess there wouldnt be much use for that since there is a minimap.

But yeah, your Idea reminds me alote of Tribes. Mounting self automated, or unit automated turrets and things would be pretty cool. And I really like the camp idea that acts as a spanw point. I think if there will be a unit like this, he should have a large handicap. Like being very slow (due to the weight of objects), or only having a pistol and a couple grenades to keep weight down.