Positive developments -- Bello's ERA is ugly (5.10), but his FIP of 2.76 suggests he's been massively unlucky. He's given up zero HR in 42.1 IP, and while obviously he won't continue with that rate, his minor league career is only 0.6 HR per 9 innings, an excellent number, so it's not a 100% fluke. He's done enough to be penciled in to the rotation next year, right? If he and Casas can be just league average next year, that's going to go a long way and allow to them to spend more in other spots.
And Reese McGuire now has the same WAR with the 2022 Red Sox that Christian Vazquez does, in 244 fewer PA. He's not going to have an OPS+ of 150 next year, not even close. But the defense has always been there, and catchers developing their bat late is a thing...he's 279/325/405 for his career against RHP in 507 PA (171/209/260 the other way). That's pretty damn good for an above average defender at catcher. I know teams like to have pitchers always throw to the same catcher (i.e., not used in a classic platoon), but it's not hard to see him turning into a really useful guy if deployed correctly.