As was mentioned in this thread, you trade potential for proven talent all day. Kevin Love is putting up stats that rival all time greats. I believe I read somewhere that only Shaq and I believe Moses has put up similar numbers to Love's 26 & 12 in the modern era.
A few years ago, Love had 25, 15 and 5 in over 5 games (perhaps more) during one season. He's the first guy ever, I believe to average 26 and 12 and hit over 100 3's. On top of that, he's only 25. You do this trade in a heart beat. He can score, rebound, pass and can keep the floor spread for Lebron and Kyrie and he's still young.
All potential means is Wiggins might be really good. It also means he might be pretty average. Who's to say that Wiggins wont be the next Wesley Johnson? If you are Cleveland, you have to make this deal.