Doubters said that Sully would have problem finishing at the rim, but he's shooting a healthy 70% at the tin. For comparison Dwight Howard, in his rookie year, converted 64% at the rim his rookie year.
Most NBA players get their interior shot off by creating space, as opposed to going over defenders. Sully is good at creating space to get his shot off.
I'd like to see the Cs dump the ball into him 3-4 times a half and let him fiddle and diddle. He has a solid back down game, can face up and drive in either direction, and even has a nice mini-hook (4-5 on hook shots). He also is a bull, and should get to the line, where he shoots a tidy 100% (11 for 11). Where he will struggle is in the pull up. He's shooting only 29% on jumpers (10-34).
It's not unusual for rookies to struggle with the jump shot. With more time and touches, Sully should come around with his jumper. He's got very good form and good touch. In the NBA, it takes a while for a player to figure out his spots and what shots he can get off and make at a high percentage.