Meh, his defense has improved leaps and bounds from year 1 to year 2 to now year 3. The Celtics rave about his work ethic in terms of building strength also, so I'm not too worried about him eventually becoming good enough on that end of the floor considering the improvement he has shown year to year. In fact, if he keeps up his defense from the last three games, he will have had finally "passed" my eye test on the defensive end despite him grading out as a positive on the defensive end in most advanced metrics since his rookie year. I saw several very good defensive plays last night from KO. It's really encouraging.