His 2PT%s have been:
.385
.385
.376
(career .382)
sutomcat, imo, is right that he has to find a way to improve in this area. My take is he should find one move that he can count on.
I can't imagine his wingspan is that great and he isn't jumping out of the gym, so I don't think he's going to jump up in % near the rim, but I do think he can find a running floater that he can get over defenders if he can get penetration into the lane.
I don't know how much higher that 2PT% will get to, but if he wants to keep improving, he has to find another move in his bag.
Unfortunately, I think the likelihood is he will probably hover around that same %, but fingers crossed.