Interesting thought, but seems like you might as well go full DH if you are going to go this option. Pretty rare that a RP bats (although, I guess one position player would be burned by the original DH - so perhaps more possibility for a RP batting). One of the arguments for having the pitcher bat is that in a one or two run game in the 6th or 7th inning, your starter is pitching well with a relatively low pitch count, a rally going, pitcher's AB comes up - now there is a strategical decision to make that you don't have with the DH. The compromise you suggest would not keep that in place. But it would add the reverse... "If I remove my SP, I lose my DH." That becomes a factor in an interesting way. I dig this idea. It's fun.