What?! [In "Frank the Tank" voice] You... you're crazy man.
Angry Mob is THE great uber-unit. With the AK and AP Bullet upgrade, you can rip apart ANY tank on the battlefield, including Overlord with gattling. (Within reason, of course. Due to the economic structure of the sides, Mobs should NEVER be outnumbered by Overlords. By the time someone is able to get 2 stock Overlords, you should already have at least 2 Mobs ready with AK upgrade... which owns. If not, you were probably gonna lose anyway.)
The problem with the mob though is that Rangers kill them WAY too easy. I definitely think that flashbang effects need to be altered (like in pro:gen where they are only used for capturing prisoners). As it is now I think these "one shot kills" flashbangs are way too cheap. ("Cheap" as in unfair, not as in they should cost more.) Perhaps they should make flashbangs only "slow" targets instead of hurting them...
Because of the cheap-a$$ rangers, there is no pure GLA counter to a Overlord/Ranger combo. Mobs are the only GLA unit that can take on the Overlord, but they can't even get close when there are flashbang
Rangers around. Meanwhile, standard Ranger counters like Technicals and Gattling Cannons get absolutely molested by Overlords. The only other possible option would be toxin units, but then these guys usually end up killing your Mob as well.
Anyways, I don't think the GLA needs any more tank units/upgrades. They were meant to be the infantry oriented sides, which is precisely why they are my favorite. The problem is just that the US got too much special treatment from the start... cursed yankee programmers! :P j/k