Queta had a chance to prove himself during the SL, but he really disappointed us. He struggled to play within the structure and only performed well when we featured him in the offense. That's not what the senior team is looking for. We just need a backup C who can play physical, dunk, alter shots, and rebound. McGee checks all those boxes.
However, I still think Queta can be an NBA player. On a team that's not super powered on offense like the Kings, maybe they can give him a bigger role off the bench where he can showcase more of his scoring. I wouldn't be surprised if he ended up "breaking out" somewhere and everyone orders why the Kings didn't keep him. Short answer: he was never going to get that type of role on this team...
I wish Queta the best of luck. Hopefully he does find his footing in the league.