Size just isn't there. Handle is average at best. Average playmaker, cant defend at this level.
If he were 6'4 to 6'7 and could shoot like he does i'd see some kind of bench potential.
His handles looked pretty good to me, he only fumbled the ball once on his very first play of the game. His second turnover was a miscommunication where Swanigan started to cut when Guy drove and passed it out to him. The third turnover wasn't really his fault, he received a bad pass and caught it falling out of bounds, darted it to Swanigan under the hoop who nearly had it. The final turnover was just him shuffling his feet before he started a dribble to the hoop, something that happens regularly in the NBA as well.
Outside of the first turnover I never saw him fumble the ball again, and he was pressed full court a few times. His handles, at least from what I've seen up to this point, are at least above average. He got by his man a few times and made quick passes while in the lane, had a couple of really nice ones where they either missed the three or missed the dunk. His vision is actually quite good and his passes were all on target except for his second turnover, and a full court pass that was slightly tipped but his target still received it.
His defense was up and down, lost his man a few times, but for the most part he fought hard and would fight through the screens. He could improve here but it's only his first game at this level.
It's only his first game, I can't say what he will or won't be based off of one game. All I can say is that I like what I see so far.