A.J.'s contact skills are just ridiculous. He doesn't take a lot of walks, but he's not going to strikeout a ton either, and he can steal bases. I see him being a Jose Altuve type at the plate (high average, not a lot of walks, lots of contact, steals, very little power), but with plus defense at a premium position. That would be a pretty good player.
With ability to hit for average, avoid the strikeout, make contact, and play defense he's like the anti-Arencibia.