I have my doubts either Petty or Lewis will sit a year. The way the NCAA is rubber stamping transfers why would they not allow them to play immediately? It's likely defined as a "hardship" due to the coaching change.
Consider this. If Kira didn't think he'd be able to play immediately what's the point of transferring and not simply shooting overseas? I can't see the reasoning behind him sitting out next season, then playing in 2021, when it's pretty clear he was headed to the NBA in 2021 as it was.