What's he waiting for?
He's waiting to see exactly what he has. He's waiting to see what the cards are that he's holding.
He needs to finds out, will Young contribute at all, is Smart a PG or not, is Rozier a player, will Hunter be able to score in the NBA, is Sully a tease or a pro, will Olynyk develop further?
This is the first full year of the rebuild, let some of these assets develop and gain some value in the league, so we can see who we want, and who may be better off being traded.