I think that's part of it with Yoshida. Although I've also read that LF in Fenway has caused some analytical glitches.
This is where Savant becomes one of my favorite sites on the internet. Exit velo and stuff are fun and all, but you can look at a stat line and generally get a decent idea of how a guy has been hitting the ball over the long term. Defense is less intuitive and has been less "public" in the past, and the upgrades made over the last two years over at Savant are absolutely incredible, especially as someone who much prefers and exciting defensive play over a home run.
That said, my eye test this year has told me that Duvall is a below average center fielder. The numbers seem to back that up for the most part. Keep in mind that, while he was a gold glove winner in 2021, that was as a right fielder, and was probably in large part due to him being second in the league in outfield assists. He had only played about 75 games in CF in his career before this season, and it shows. I know his bombs are fun, but I am 100% okay with the team moving on from him after this year.
Also, seriously, my favorite part of Savant is that you can look at this chart, click on any of the dots, and watch the play instantaneously. It's an absolute miracle.
Duvall, for instance, has made three plays that fall into the 4 or 5 difficulty scale. Yoshida has made 1 four star catch, and Schwarber has made one 3 star or harder catch. There's a lot more that it covers that I won't go into while taking the thread off topic, but if anyone here doesn't use Savant, I think you should check it out. It is a phenomenal web site.