We'll have to agree to disagree.
We have plenty of pitchers who do very well vs LHPs, including RH'd Thornburg who has amazing reverse splits:
vs LHBs: .531
vs RHBs: .732
We could probably trade Abad for a decent RP'er with an option left...even more so with Hembree as he has 3 years of team control remaining.
I love having Wright or Pom in the pen. That's an addition that costs us no more money or prospects to trade for a pitcher of their caliber. To me, it's a waste to not use one of them in the pen. Sending ERod to AAA weakens the pen too much to offset any loss in depth we may encounter by having to trade Abad or HH. Plus, we can just create an injury and keep them on "rehab" to prolong any decision.
Again, we are talking about the current roster and assuming everyone is healthy, which probably won't happen, so all this debate would be about nothing.
We might trade for a pen arm, and then a debate could follow, but I really don't see sending down a healthy and productive ERod as a even a slight consideration for the small plus it might give us by allowing us to keep both ABad and Hembree on the team.
I respect your opinion, and maybe we view the word "consideration" in different ways, but I don't see it happening, unless we make a trade or signing and further crowd the pen.