I'm not sure he is quite ready yet. When he misses it seems like it's almost always long. I would say 3/4 misses are long. To me that means he gets a little too jacked up with adrenaline as a frosh. Next year I suspect he will be much more comfortable.
That being said he made a great play late in the game vs Uconn
What ive noticed from Evans is he needs to be set when he gets the ball to shoot. There have been times where he is running up the floor, trailing the play a bit and gets a pass around the 3 point line. If when he receives the ball he takes a step or two forward before he shoots( no dribble) those are usually the ones he misses pretty badly on. So what I would recommend for now until he gets an off season to work on it is, if he isnt set and ready to shoot, use your pump fake and take it to the hoop or work for that smooth pull up jumper