Bobby made most anyone look good, including Gorilla who had his own deficiencies in the broadcast booth. Although I think Ventura was better at working around those, where Heenan could sometimes but not always.
I think he gets way too much flak for his time in WCW. It's clear that Bischoff did not know how to produce him in the similar manner which Vince and Bruce Prichard did, so in that regard it is sub-par in comparison. But there were times his talent shone pretty quickly. It wasn't very often, but the three-man booth of Bobby, Tony Schiavone and Dusty were great together. Quite a bit of personal history among the three of them, and there was chemistry that must have gone unnoticed by the people that could have made them the default broadcasting team.