Possible? Sure. I don't think anyone should dispute that it was possible.
A good idea? I don't think it would have been a good idea.
The new front office who didn't have any hands-on experience with Berrios. He was absolutely terrible last season. He barely pitched in Spring Training so the new front office left March still barely seeing the guy. It made all the sense in the world to give that guy a few weeks of observation in Rochester before deciding whether he was MLB material.
We don't even know if Berrios was working on anything specific in MiLB so that's another reason why they may have wanted to see him in Rochester for a month.
Unfortunately that possibility seems to be a pretty strong point of disagreement.
I get that, but the people who have the most intimate knowledge of Berrios, the coaching and development staff, are all still in place. Falvey isn't "flying blind," for lack of a better term. To me the WBC/ST thing was an easier sell than simply saying "we want him to spend more time in AAA." The roster decisions during ST suggest they knew who was making the 25 man before the games started. That isn't an indictment or endorsement of the strategy. It's hard for me to imagine that if Berrios had thrown another 10 innings to match Mejia's total for the spring the decision would have been different.