I think it will be a win-win trade for both teams.
I see it like the Red Sox trade of Hanley Ramirez (and Anibal Sanchez) for Josh Beckett and Mike Lowell. Ramirez turned into a superstar who had more value than either Beckett or Lowell, and he produced for a longer time than either. However, the Sox won a World Series due to the trade, so does anybody really regret the deal? I don't think most Sox fans care that much (and years later, Ramirez is back, strangely enough.)
It's the same thing with Wiggins / Love. Love is the floor spacer that Lebron needs. If the Cavs win a title (or multiple titles), it doesn't really matter if Wiggins becomes the next superstar. Lebron has a shortening window, and he wants to win now.
Also, it's hard to blame the Cavs, since there are at least some rumors that it was the prospect of landing Love that got Lebron to sign in the first place. According to those accounts, Lebron / Wiggins was never a possibility.