The choice is really Cordero and Renroe vs off-handed pitchers vs Arroyo/Chavis/Gonzalez.
A Renfroe-Cordero platoon is much better than each playing everyday.
Here are the career splits:
vs RHP
.786 Cordero (243 PAs)
.740 Chavis (168 PAs)
.732 Gonzalez
.717 Renfroe
.678 Arroyo (176 PAs)
.673 EHern
vs LHPs
.912 Renfroe
.820 EHern
.724 Gonzalez
.699 Chavis
.597 Arroyo (129 PAs)
.573 Cordero (72 PAs)
There are better offensive options based on some small sample sizes, but when you factor in defense, I'm not so sure keeping EHern at 2B is the best idea.
Okay, let's say Chavis starts in AAA, and we discount Marwin's trashcan-banging season and just compare Arroy0 (.678) to Renfroe (.717) vs RHPs. Is Renfroe really that much better, off handed, as to make up the difference on defense at 3-4 positions? (worse at 2B, RF, CF and maybe LF)
Versus LHPs, Renfroe and EHern are playing- no doubt. So, who is the next best? Fine, throw out Chavis and Marwin, again, and Arroyo still looks better than Cordero on offense, small sample sizes and all.