His swing is great and mechanically very sound but for the most part he hasn't shown much ability to deviate from that swing in order to put bat-on-ball in key situations.
The bloop, go ahead hit he had against the Texas Rangers in the finale of that series was one of the rare times we saw him doing anything of the sort...
Maybe some time away will help, we'll see. Mentally, he still seems confident, but that confidence may be part of the problem at this point if it's inhibiting his ability to make adjustments.