They're very reminiscent of the weird, one off characters prevalent in the original Marvel UK run of Transformers. See stuff like the original Mayhem Attack Squad, Pyro, the Decepticon Triumverate, etc. I suspect that they were supposed to be Robert's version of those guys, except actually competent. The problem is that they never got a proper buildup, exploration and/or sendoff. They basically were awful monsters for a few books, we got like 2 books of backstory/development. And then they died. Compare that to all the exploration we got on Overlord. Odd and inconsistent, but at least we got cool looking dudes out of the deal.