As for Suh: the issue was not whether he was good, but whether he would fit in the locker room. And BTW, it sure wasn't Suh that got us over the hump and in the Superbowl. He had a pretty mediocre year.
JJ Watt can't and hasn't stayed healthy for years. And we're not talking about pulled muscles. We're talking serious injuries with long rehabs and unpredictable outcomes.
Bad fit.