The way I see it, going forward from the deadline to seasons' end they felt Rodgers could reasonably replicate the results Hader would give them, plus they added depth in the other deals, plus two prospects that are much more than lottery tix. All of this is reasonable. But after a miserable stretch, Hader straightened himself out while Bush was worse than what he was in Texas, and Rodgers arguably worse, certainly no better.
I think there was plenty of reason, the reasons just didn't click, exasperated by the Rosenthal fiasco.