Coming out of college (2 yrs ago) he was known as a high energy, good defender, good rebounder for a wing who had to work on his offense.
But in the g league he had a 40 point game, a 43 point game (both in the past few weeks). A 34 point game earlier this season and a 36 point game last season. So clearly he has worked on his scoring (although to be fair, the g league is more of a run and gun, offense oriented league. But still, some impressive numbers, nonetheless).
So you combine the defense he showed in college with the offense he has shown in the g-league. And consider that he's still only 21 yrs old.
It's a low risk, high reward pickup. Solid move.
Highlights from his 40 point game from 3 weeks ago:
Oh and this is nice too. I doubt he plays any meaningful mins if we see the Bucks in the ECF, but it's nice to know that he's at least a guy who has frustrated Giannis in the past with his defense

I get people might look at his stats and think he can't shoot.
But he's been shooting the ball much better lately from 3, in the g league.
First 26 games = 32/107 (29.9%), 4.1 attempts per game
Last 10 games = 22/57 (38.6%), 5.7 attempts per game
So his 3 pt % is WAY up over his last 10 games - on higher volume, too.