I don't wanna invalidate anything you said there, cause he's indeed not a special drummer at all, but he does have some mega-phat grooves at times, at least he used to. In the past (on Justice for instance) he actually played pretty well, there's some technical stuff going on here and there, on Justice particularly.
He doesn't have a lot of ability technically, but as said, he does (did) have a groove. My point is that drummers often get judged purely based on technical ability, while flow and groove are at least as important i.m.o. Just take Jonas' drumming, technical ability?? Hell no! Groove and effectiveness? Definitely!