Playing the 4 was more out of necessity with Amile going down. At times he looked good but it was really obvious he wasn't ready physically to guard the interior, even on the college level. His length bailed him out quite a few times.
You could say the same thing about him on the offensive end too though, his length bailed him out a lot, and the lack of strength/weight hurt his post game.
It was good recognition even if it happened because of Amile getting hurt. He was struggling had at the 3. I remember Kuzma on Utah giving him a lot of trouble.