It's not like he's been bad when he's out there. He's got a PER of 21.0 right now.
For comparison with our team...
36.0 Burton (holy balls)
27.8 Niang (much better than years previously on efficiency)
23.2 Morris
22.9 McKay
So he's playing at the efficiency level of all-conference players, at least in short bursts. Surprised Self is sitting him considering how their front court is their relatively weak unit.
His offensive rating is around 100, however, and his defensive rating is near 85, so he's got some room to growth and is still a small liability on defense relative to other options.