He was a capable character, but of the four VEATs (Villain Epic ArcheTypes), I liked crab soldiers the best. It's hard to beat what was essentially a blaster with mez protection and some shielding. But Widow's Boy had stronger shielding and good melee capability as well as some ranged damage. He wasn't "bad" by any means – just not as good.
Like most my villains, he didn't like to cause people pain, so he became a rogue.