This'll be less of an issue in 4.4 where role skills will still exist but be unrestricted (as my original motivation was freeing up role action space), but I still think that the original class-specific versions of Low Blow and Esuna should be reinstated (at the levels they are currently available as role skills, in order to avoid the original 'leeches' issue). If only for flavor, as they didn't combine the other only-different-in-name skills shared between classes.