Health will be the biggest issue around him. But his injuries aren't as serious as Freese'. He does have a hip issue that he plays through.
He is fast. One of the better defenders in CF. Let's put it this way. Trout was moved out of CF to put Peter there, not Peter moving positions so Trout can play CF. He's that much better defensively. IMO, Peter is probably one of the top defenders in CF in MLB right now.
Hitting wise, he works the count real well. He is odd in that he doesn't steal bases. But he is very quick on the basepads. IMO, he is slower than Trout at home to first, but faster than him past that.
If he's healthy, he will be your CF. Your prospect or anyone else there can move to another position.