I think I'm out on that fake trade, but I really love all the work Chawson puts into this stuff & his work is a big reason I kept coming back to the forum.
Arraez is pretty good, but there's no real evidence that Kepler or Stallings are even average hitters. Kepler is the better defensive RF, but Verdugo has been the better hitter, & is 3 years younger. Kind of a wash to me. For tax purposes it looks like Kepler would cost $7m AAV this year & $10m next year if they take the club option. Verdugo's arb estimate for this year is $7.1m & he has 1 more arb year, so that's kind of a wash, too.
So then there's the Wong to Stallings thing. Seems like a fairly significant defensive upgrade, but Wong is projected to be the better hitter than Stallings this year, is 7 years younger & is under control for like 6 more years (as opposed to Stallings' 2 arb years). Also, McGuire is already a really good defensive catcher, so I don't really see much point in going that route, unless we expect McGuire not to be able to hit enough to stay in the lineup. It's also not like Stallings crushes lefties either - he had a 69 wRC+ against lefties last year, 72 against righties. For his career he is 87 against lefties, 82 against righties. Then again, for the Red Sox, Wong has a -23 wRC+ against lefties & 130 against righties, but I'll chalk this up to a sample-size issue (24 PAs against lefties, 46 against righties). His splits in the minors seem pretty even, too, though, with him hitting lefties slightly better the past 2 seasons, but righties significantly better in 2019. Anyway, based on cost/window/existence of McGuire as a glove 1st catcher, I wouldn't do this straight up.
So I'm left with trading Rafeala & Yorke for 3 years of Arraez. If we had a championship caliber team this year, I could certainly see that as the right move. Arraez does a lot of the things the Red Sox seem to be really valuing with their off season moves to date. It feels like they would be selling really low on Yorke, though, & I think he's going to bounce back from an injury plagued 2022, where he started super slow but then got better when he was healthy & crushed Fall League.
Yorke isn't even 21 yet, & if he stays on track he fits great into the future infield with Casas/Meyer/Devers. I think I'd be willing to go Rafaela/Lugo, but that's about it.