It's really early, so small sample size and whatnot, but thus far, he's striking out at the same rate, walking significantly less, and has a slightly lower percentage of hits for extra bases. He's even hitting the ball on the ground slightly more. The big difference is BABip - .260 last year versus .333 this year.
.260 is unsustainably low and .333 is a bit higher than average.
While BABip can be luck related, the eye test looks like he's hitting the ball much harder than last year. Last year's slow dribblers are scalded shots. One rate stat that backs up the eye test is that (even before tonight's blast) his HR to Fly Out ratio is triple what last year's was. The balls that died on the warning track last year are leaving the yard this year.
Again, early, but very encouraging.