I think we probably should temper expectations for Carey and Richards to make an immediate impact the second half of the season. Both guys are already at a disadvantage not having summer league, a full training camp and constant G League access. The bubble has been huge for them, but given the lack of practice time going forward and general game experience in the NBA, I don't see either supplanting Biz in the rotation. Both should be featured way more next season.
The only path towards eliminating Biz's minutes is by trading for a backup center at the deadline. There are some guys out there that I think could be good and could be had by trading someone like Devonte. We'll see.