The idea would be to PH Renfroe for Cordero or Cordero for Renfroe after a pitching change, but a manager might be reluctant with a 2 man bench. (I don't count Plawecki.) Renfroe still has a massive split differential, while Cordero has yet to show his normal wide L-R split.
For the same reason the 14th pitcher offers more options rather than filling a need, so does having a 3 man bench vs a 2 man bench.
I might offer the argument that there is actual need for the extra bench guy, either as a PH'er, a defensive replacement or just to offer flexibility or an emergency back-up.
The horse has been beaten enough. It's not a major issue that affects the team that much either way.