I agree that one of Pearson or Merryweather can really make a big difference in the pen. I've said at the beginning of the season if Pearson can pull an Aaron Sanchez 2015, that would be a huge boost for the Blue Jays. How long do we wait for that to happen though? Also, why should that stop the Jays from looking to upgrade the bullpen in the offseason?
As well, the names you listed above, while solid arms, we both know bullpen arms can be volatile. What happens if one or two of those arms regress big time next season or suffer a serious injury? You always need pitching depth and arms that you can call upon during a season. Look at elite organizations like the Dodgers, Astros, and Rays as examples.
At some point in time, the Blue Jays FO can't be rolling out mediocre bullpens every season with this elite core of players and starting pitchers they have. You can't be wasting the 2023 or 2024 season in hoping that you can cheaply build an elite bullpen. It's definitely possible as we've seen previous Blue Jays FO's building elite pens and other organizations as well, but even most of those organizations like the Rays, A's, Royals had payroll constraints so its understandable.