I gotta tell ya, I feel bad beating on those little guys. It really just affirms my belief that the gremlins are friendly (I mean really, they send mechanics and healers at us at tier 1).
Currently, they deal really little damage for the time needed to prep and they're pretty weak even in massive numbers to the point that I can just crush them easily with my wild hunting blade. In fact, I would even say they're weaker than chromalisks.
Here are some suggestions I feel:
Increase radius of effect of their charge or raw damage.
or
Give them a new attack (maybe some melee with dual wielding of their little sticks)
Yes, their attack range is so small. I have no problem dispatching of them as a gunner or a bomber.