I wouldn't put Crawford back in the pen. The question is who do you squeeze out to put Bello back in. Wait for an injury? With Sale/Kluber/Whitlock, you may not have to wait until the second half. They have Pivetta for another year. Does that provide trade value to a small market team if they want to move him? Otherwise, I'm not sure you move him out for poor performance since he's really pitching at what is expected of him. Bello SHOULD be better than Pivetta in 2023, but there's no guarantee. Wait for Bello to really knock down that door and force a decision?
As long as Houck is dealing, Bello will most likely be in AAA in the short term unless things change with the health of Sale/Kluber/Whitlock/Pivetta.