I kinda like the strategy. With a shorter bench, those guys get a lot more playing time to stay fresh. And the longer bullpen with 4 lefties gives Bell the ability to avoid risk by pulling pitchers early, play match ups, pull relievers if they aren't sharp.
The downside is the lack of a pinch hitter in extra innings.
Using Peraza in LF helps get a rh bat out there. So what's more valuable to the team Ervin on the bench or an extra reliever?