Don't panic.
Celtics fans, relax: Terry Rozier will grow on you. He's cut from the same cloth as Marcus Smart, and you love him once you see him defend. He goes hard on defense with an intense mentality, willing to dive on the floor for loose balls or defend larger players. He has excellent lateral quickness and a strong frame, giving him the versatility to translate that skill to the NBA level.
I had him ranked low in my big board, but re-evaluated in recent weeks, moving him up into the late 20s. But I wasn't willing to push him up further, as his success likely would've depended on situation.