little bit late here but relic hasn't necessarily created any textures. the camouflage is done off a base pattern and then laid out in the UVW unwrap. if there aren't any heavy models there isn't any unwraps for them and therefore there isn't any textures. the slot itself doesn't mean anything as there doesn't have to be models for there to be a slot and the only reason the slot is there for USF at this point is because it's there for every other faction, which has heavies right now and it would require work to remove the slot. also, it builds hype.
still someone must have done the work to make it right? i mean you and i both know that it costs time and money...