Where are you getting your data? O-Swing is the same:
Career: 35.7%
2020: 34.7%
Barrels is up a tick from 2017/2018. We're talking about 13 barrels this year, an extremely small sample and could be he's faced more s***** pitching.
The other stuff you mentioned is definitely notable. He may have tweaked something with his swing or approach that's leading to better results but he's still likely getting lucky with the fly balls. Either way, enjoy it while it lasts.