This talk about SCH being a lesser healer, and support instead, reminds of that historic moment in the beta test where some party didn't want to believe that MRD was a tank class, and wouldn't have me in their group for Tam-Tara even though they spent an hour shouting for a tank before there was a working DF. If SCH was really a weaker healer, one full-party's tank would always be destined to die on anything where the healers have to focus on one tank each, i.e. Caduceus after a split. Also, the special effects from the fairies are limited to two different types, so you have either one or the other (Silence and Spell Speed buff, or regen-like ability and Skill Speed buff), and usually don't have any time, MP, or Swiftcasts to swap them out all willy-nilly in the difficult content.

Essentially though, there's merit to the Support role as a concept. I am also reminded of this Ifrit HM not too long ago where the DF group somehow ended up with four BRDs. That just shouldn't be a possibility!

That said, it's not a matter of shoehorning existing classes and jobs into it when they're clearly already firmly in one role (BRD is the only oddball in the mix), but rather, introducing new classes and jobs that fill that role along with BRD so it doesn't bottleneck the duty finder.