Its a decent pen with solid depth though it's still not an elite pen in my opinion.
My concern so far is a lot of pen arms being overworked in the early going. They won't be able to keep up this pace in the dog days of summer and fall. It's important this team gets some length from their starters, which have been really awful thus far, outside of Gausman. When guys are going good, we need Gausman and Manoah hopefully pitching into the 7th inning on a consistent basis.
I'm not concerned with Romano as a stopper. Just hopefully he's kept fresh during the season because you'll have to rely heavy on him in the Postseason.
If Green comes back and pitches close to his previous form and if they add Pearson to this BP mix, I think that could make a big difference.
Otherwise, this BP still misses some guys with swing and miss stuff. I'm not completely confident in them having a lockdown 7th or 8th inning guy. I don't consider Garcia or Mayza those kind of guys despite them being solid to start the season. Swanson in the same boat.
Bass, Cimber, Pop IMO are just middle relievers. I don't want them pitching in a close 1-run game with runners on base in the 7th or 8th inning.
The bullpen is likely good enough to get through the season if they aren't overworked, though come Postseason time I'm not sure it's good enough especially when starters are on shorter leashes in the Postseason. I think internally, they can improve if Green comes back and if Pearson steps up in a big way. Otherwise, I think they might need to add another elite reliever at the trade deadline.