I don’t think it’s time to trade Kessler, but we gotta realize Kessler isn’t Gobert (even Gobert isn’t Gobert anymore). We can’t just stroll out 4 bad defenders and perform at a top 5 level around a dominant big. That doesn’t mean trade Kessler, it means we need to trade/acquire more defense around Kessler.
But honestly, I think right now it’s more that we don’t have a plan. I can’t even tell what we’re trying to do on defense, it goes beyond talent. As awesome as Hardy has been, he still needs to prove that he can put together an effective defensive game plan.