I think adding a support role would be cool, mostly because I personally am drawn to that role. That's why I'm enjoying Astrologian because I get a touch of it. If they was to implement and add support roles, jobs, I think the current jobs could stay as is. Bard, Machinist- dps, Astrologian - healer, etc. But instead add new jobs that are completely support. Like Dancer or whatever. Knowing these roles are very niche within players DF becomes a major concern. So why not make it so supports could be a "bonus". Instead of 4 man dungeons up it to 5. 1 tank, healer, 2 dps, 1 support. However make support not mandatory. If a support role does not cue in within a time set, then the group can proceed as normal without one. To me I think a support role is more of a buffing job. One job could specialize in buffing allies, another could be debuffing enemies. Not dps, healing, or tanking.