When it comes to the tools, I see a guy with a live arm who can deliver the ball with great timing. He needs work on how and where he uses velocity on his throws, but he can make all of them. I don't see a great athlete -- this isn't a guy who will run the read-option for you consistently, but he's shown he can run it, and he has what I call "nuisance speed." He has enough to bother you if you don't account for him, and he can scramble for first downs. He's benched 420 pounds, so the guy has some strength and can stand in there and take a hit.
I can't stand here and predict a great career for Nassib. But I'm not afraid to call him a sleeper because I know he can make adjustments, I know he's been able to thrive in situations in which he's not being handed a big talent advantage and I know he can make calls and execute at pace.