You need to be confident to be a scorer who can get to the rim. A lot of these guys are athletic but it takes a mentality to attack the rim and see openings in the defense and run full speed into them. There is a lot of mental game to a good finisher at the rim in the NBA. He's showing that off the bat which I really like to see. This team needs shooting but it needs a guy who can get to the rim, create his own shot, and finish on the break as well.
It also takes a lot of strength and endurance to play like that consistently. People underrate how much jumping and contact around the rim takes out of you energy wise. It's what has made LeBron so impressive as an athlete for me. He should get better there.
Brown looks promising. His slashing has great value in a team based on spacing. With a respectable jump shot he should be a tough cover.
The most consistent scorers are those that get to the line and he certainly did that in his first game. He missed some FTs but one game is not anything to draw from in that regard. Personally, I look at how guys play more than anything in Summer League (have they added parts to their game, what is their mentality, how do they look in the NBA system vs college).