Miami had a man closely on Bowen even when the ball was on the other side of the court. To his credit, he is contributing in ways other than being a shooter this year. He's just streaky. My opinion is that his accuracy is directly related to his form. When he has time, squares up and is steady, it goes in. When he rushes and is drifting to one side or the other his shooting suffers.
As for Evan, he's not in the lineup for his shooting. You can see now that the opponents know it and are almost daring him to shoot when he's on the perimeter. I think Pete Suder could tell you why Evan is in the lineup.