If they send him down he'll do the same thing as last time, mash the crap out of the pitching and OPS in the 1100-1200 range, prompting another call up inside a couple of weeks. He's never going to be a major league outfielder and he's not going to learn plate discipline at AAA, he doesn't need it there. Stick him at DH and hope he starts to figure it out at some point, he's still ridiculously young. That means sending Vargas down. The bigger issue remains having three players who all profile as full time DH's. A good problem to have provided they're all hitting, not such a good one if they aren't.