I love Rozier. He has always been a very active defender and is in the area for every loose ball - be it a rebound, deflection, errant pass, etc. There are two types of players out there: those who wait for the game to come to them and those who are always a part of the game. Rozier is the latter.
That being said, even though Rozier seems to have improved on his shooting and shot selection over the off-season, he still has a long way to go to reach Kyrie status in terms of offensive production. However, if he continues this upward trajectory and Smart gets offers in the upper teens or higher, DA and Stevens may feel a little more comfortable letting him go (if they have to - I don't want that to happen).