The greatest Transformer sub-group to ever exist surely has to be the Insections. Sure, some may argue for the Dinobots, but they are supremely overrated. It's all about Shrapnel, Kickback and Bombshell. These sadistic, eccentric, perpetually hungry villains stole the spotlight in every G1 episode they appeared in, and who could disagree with the fact that they just look awesome?
Okay, so this is merely fanboy wishing more than anything else, but the Insecticons really do deserve an in-game appearance at some point in time. We know Cybertron doesn't actually have any insects on it, but... maybe there are space weevils they could emulate?