Advanced stats say he's progressed to "meh" level defense. He's not good, but he's far from the horrible Harden level. Yeah, you want to get a rim protector next to him, but he'll be fine in a sound defensive concept.

As far as OKC being clearly better than them, y'all are seriously sleeping on how good Bron and especially Love really are. It's cool. Sounds like the trade is done, so you'll learn.