The defense is the main thing.
He already makes his teammates better. When hayward was out with injury burks averaged about 5 assists per game in less minutes that hayward, and hayward only averaged around 5 assists on his 36+ minutes.
So just going off assists, burks is about equal to hayward when taking haywards place in the lineup.
(Watch kanter and goberts highlight videos and you will see many nice passes from alec to them)
As for learn how to use a pick. The great thing about burks is that he doesnt need a pick to score, beat his man, get open, or get to the basket and kick to teammates. In an offense based on spacing, this would be a great attribute because you would not need to bring a man to set a pick for him. (bringing two players, and thier defenders, close to each other which could destroy spacing)
His defense does need alot of improvement though
You take things wayyyyyy too far when it comes to Burks....