I'm arguing that if he changed his launch angle when he tries to hit a FB (which he doesn't always try to do based on his differing swing path depending on the pitch) and sacrificed flyballs for more line-drives then his BA would go up. The highest BA/xBA among FB, LD, and GB is line-drives, so the data supports my hypothesis. His LD% has gone up this year too along with his BA and xBA.
Yes it's a funny coincidence but it doesn't prove any point against my argument, which is what you also seemed to be trying to use it for.
I agree that when he hits FB he should be trying to pull them as much as possible, as I already mentioned when I said if he wants to hit more HR he should try to pull them down the line like Isaac Paredes, who like Nico also lacks bat speed/EV/power.
As you know, i'm not specifically concerned about him avoiding all "balls in the air" (i didn't mean that in the statcast definition of the word, which includes line-drives), i'm concerned about flyballs specifically, especially ones not pulled down the down. Line-drives are good. Flyballs in the direction of the leftfielder (where he seems to hit them a lot) or maybe even the LF-CF gap I don't think will produce optimal results because he doesn't hit the ball hard enough. He's not going to turn into Alex Bregman.
Nico's HR/FB this year is more than twice as high as last year and significantly higher than his career rate. It's unlikely he maintains that though I hope he does. Might depend on the Wrigley winds and how much he can improve pulling the ball. It just sucks when less than 5% of his career flyballs haven't resulted in a HR and most seem to die in the glove of an OF. We've seen him try to hit more HR before and it hasn't worked.