I haven't played that but if it's anything like Warzone 2100 (probably not) then it's actually okay. Warzone has a lot of research options to which you can customise your army with that as the gameplay constantly changes as you progress throughout the game. This game even encourages you to use lesser/inferior units as much as possible as they drain less oil and produce much quicker than the slow, unwieldy and oil hungry superior units. There's so many options that the faction itself is quite diverse and in many ways, unique.
I'm also aware of the other faction, the Scavengers which are a bit like the GLA in which they use flimsy structures and requisition other types of units for their needs (flamethrower fire truck
). However they are not playable by official means and instead they serve as a supporting enemy faction in the campaign/hostile annoyance to those in multiplayer.
edit: My point is that if it's a faction with a few units and no customisation then it's going to be very bland and quite frankly, a turn off. Not something I'd want to play because after a few rounds, you'll know what you're up against.