When your team can turn a couple of scrap heap guys into a player with a plus, plus tool, you're doing it right. Demeritte has huge power and he also walks a good bit. His struggles to make contact are real but that mixture of power and willingness to take a walk gives him a chance.
Odds are this kid wont be an impact major leaguer but his ceiling is huge! If he can cut his Ks to a respectable level then he could be a star. Getting someone with that kind of ceiling for scrap heap guys is ridiculous. There's absolutely nothing to dislike about this trade.