Harper is a good news/bad news player
Good news is he's not afraid to take a big shot when it matters. Bad news is he's not afraid to take a big shot when it matters. He's going to be completely reliant on his speed, so when he loses that first step, it will be a big push against his potential production.
However, there's nothing wrong with giving him a look at and some burn. He will need to score at volume though to be useful. From the coaching side, they've got to get him to take much better shots.
The danger with a player like this, if he starts to break through some, is to overexpose him. A limited roster around him can create that situation. You've got to manage his minutes and his matchups.
A player like this is where a good coach makes a difference. Spolestra could mine something out of this guy, whatever he had to give. A guy like Woodson could not.