I did not see Nowell this past winter but I did see him live last spring at the UA event in NYC....he was playing against other elite teams from around the country and he's a tough/hard nosed/pain in the neck on the ball defender.....he is also fearless in attacking the basket and taking on larger defenders while driving to the hoop....
He was screen and rolled and teams forced switches on him and he tried his best to defend and did OK.....He's generously listed at 5'9".....he's not Myles Mack by any stretch and is nowhere near the shooter Mack was/is.....Mack's only issue was he was asked to do/play a little too many minutes on the ball, vs being a general guard/microwave option off the bench at this level.....Mack was a better shooter than Seton Hall's Myles Powell, who is a solid 6'0" and Powell had 3 to 4 other scorers on the court with him, during his 1st 2 years at SHU.....RU didn't have enough scorers or other guards to be a lead guard, where you can have Mack as a spot up shooter.
Nowell is a player that will succeed wherever he lands because he's determined and I would not bet against him....I would not however take him at this level of play in the B1G, it becomes an immediate liability where teams can take advantage of him and he doesn't knock down enough shots from 3, to counter that when he's on the court....I know people loved watching the UMBC small guard create havoc against UVA, but that's not something I would expect over 20+ B1G games....