I'm hoping we can convince him to sign overseas another year. We need to free up his cap space, and 4+ rookies in the roster (along with Fultz, Zizic and Nader) seems untenable.
I'm hoping we can convince him to sign in Maine next year, because I think it would make his transition to the NBA better in 2018.
That said, I think we're looking at four rookies on the roster anyway next year, whether that fourth is Yabusele or the 37th pick. You can only dress 13, and you're allowed to send only 1st and 2nd year players to Maine. Fultz and Zizic would be in the rotation most likely, so a combination of Nader, Yabusele, and the 37th pick will be inactive most nights and playing in Maine, essentially mirroring Jackson and Mickey this year. If we keep Jackson, we might just have three rookies, but I expect him to be moved and that we'll have four.
But again, Stevens won't have to coach those guys except in training camp and when they want practice bodies. He'll have to teach Fultz and Zizic, which is I think the most he's like to do while competing.