Entering tonight he had a K rate of 19.2% in 151 PAs since being recalled. And K rate actually stabilizes pretty well with a sample that pick, so the usual small sample caveats don't really apply.
He was at a 149 wRC+ before tonight in those 151 PAs, and none of the underlying numbers were really unsustainable. His BABIP was .352, which may not be sustainable over a 3 year period, but can be sustained over a season. So he's probably benefitted from a little batted ball luck, but not too much. Even if you were to regress the BABIP .30 or so points he'd still clear a 140 wRC+. His ISO is around .230 or so and that's completely sustainable. Can obviously swing a bit year to year, but overall you'd expect Meadows to reliably have an ISO of .200+.
Meadows will hit for enough power that as long as he maintains a K rate of 20% he'll be a 130+ OPS+ hitter, and that is starting to look like a very promising and realistic outcome.