Last year he slashed 290/.330/.404, not horrible for a catcher. Maybe Cora feels he’ll still come around. At 27 years old, he shouldn’t be anywhere near done yet. I still say he looks a bit tubby, which, however, you’d think would affect his fielding more than his hitting.
He might be another guy for whom the launch angle revamp isn't working.
Looking at Vaz's Statcast metrics, three things pop out:
1. His average launch angle has jumped from 7.9 in 2017 to 10.4 this year.
2. Perhaps relatedly, he's under the ball 28.7 percent of the time, compared to 20.7 percent last year. There's a bit more hard contact, but he's popping up more than twice the rate he did last year.
3. Pitchers are throwing him a lot more sliders, and he's doing nothing with them. His chase contact has plummeted from 75.3% to 64.1%. His modest productivity against breaking pitches last year has completely tanked, from .293 wOBA to .159 wOBA in 2018.
In plain terms, it seems like he's attempted to revamp his swing, and subsequently lost the ability to flare breaking balls into right field for base hits, arguably his best offensive skill.
He put up a .376 wOBA hitting the ball up the middle and to the opposite way last year (185 PAs). This year he's at .149 wOBA, with no appreciable difference in directional batted ball splits.