Batted ball data becomes 50% stable at 50 batted ball events.
Right now, for players with 50+ BBE, Espinal ranks:
50 out of 148 in barrel%
115 out of 148 in max EV
So he still looks like someone with below average raw power.
I do agree he is not likely to be a 20 HR hitter now. Just not enough raw juice there. His added pop is more like, he could tickle 15 homers, I guess?
If he hits 20 it's a career year. Jeff McNeil hitting 23 type of thing.