His first step is really fast, if he improves his 3p% (which is already decent) he could be really good.
And we do not have a player with a similar set of skills (ball handling, speed, penetration) so the 'he's redundant' argument is IMO way off the mark.
It's less a "he's redundant" thing than "we just spent our highest first round pick on a guy who projects as our 4th or 5th guard."
Even if I accept that Rozier was the best player available, to really justify picking him there I think you would have to believe he was a clear cut above the other names in play -- Portis, Dekker, RHJ, Grant, Anderson. I'm on record as being very skeptical of that.
I think Danny felt like the middle of this draft was pretty weak, and he went with the one kind of player he knows he can scout. So Rozier will probably be a decent NBA player.
But will it be with the Celtics?
And does adding another "asset" really make a difference when we already have a mountain of them and nobody seems to be interested in what we're selling?
How do you even develop this new "asset" when he's probably going to spend all of his time in the D-League even though he's already 21 years old?