Wheeler projects as a good, but not elite, workhorse #2 starter. Myself personally, I would trade that with some other pieces for a young, elite level RF talent like Justin Upton.
It's always the best policy to trade non-elite players for elite players. Wheeler is good, but he's not elite. He's certainly not in Strasburg/Kershaw company and it's doubtful he'll be a true ace. More like a good #2.