Unless a support role was added as additional slot to the party finder/makeup it will not and should not be added.

A pure support would be ridiculed beyond recognition in any dungeon/raid where the "race" seems to always take priority over anything else. Every run is a rush fest or constant complaining occurs.

support would be a bad idea, horrible in the current design. Im not saying I wouldnt enjoy one, but the role would be excluded 9x out of 10.