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. If they did have heals or dps, it should be considerably lower than the jobs that fill that role.