If I had my money on one hitter bouncing back that can be taken EXTREMELY late in drafts, its Wells. Berkman benefited from batting in the same lineup as Pujols, and I think Wells is very capable of having a big rebound year. Even if Wells doesnt perform well again this year, he still comes dirt cheap this year.
Wells is an every other year player and his stuggles last year were actually BAPIP related. If his BAPIP returns to normal he could go .275, 85, 25, 85, 8. That's not bad in fantasy but he's going to have to find a way to stay in the lineup since the Angels have a lot of OF options.
I concur with the OP. Wells has a chip on his shoulder with Trout lurking. The plate discipline and bat speed is starting to diminish, but few have the upside Wells has in the last couple of rounds in the draft.
This is the prime reason that BABIP needs to be looked at with a huge grain of salt for hitters. They have immense control over their own BABIP and sometimes they just plain suck. And Wells just plain sucks. He'll struggle to get playing time and he'll not be worth using when he's in the lineup. He overhauled his swing and approach in the offseason so I suppose there's some nonzero chance he has a renaissance but I wouldn't bet on it.