LW.. not sure about his skating and defensive play..
Those are two parts of his game that need improvement.
Shalla is an excellent opportunistic scorer. He finds open ice well, he anticipates plays and he's very dangerous anywhere close to the net. And while he doesn't have a tremendously hard shot, nor is he the type of scorer who'll come down a wing and just rip a wrister top shelf (like a Tyler Toffoli or Christian Thomas), he gets the puck off his stick and into the back of the net very quickly. A lot of one time goals and garbage goals around the crease.
If he was a small guy, I'd be concerned about him moving up to the next level (like say a Brett Parnham). But he's got good size and is a very strong kid who doesn't get pushed around very easily, nor does he back down from the corners or the front of the net.
But he's a pretty one dimensional player in that he can score goals and that's really about it. All the rest of the parts of his game are either average or below average.
That being said, who wouldn't want to take a chance on a 6'2, 200lbs scorer. Some guys have made some great money doing the things he does well.