I'd love to have a pure support job, but as others stated, I doubt it would ever work in the current game. No, DNC and BRD don't count. I would define support as something that mainly contributes to group DPS with buffs / debuffs, with barely (if any) pdps... with current combat design this already makes it highly unlikely that we'll get anything like this (at least in DPS role).

AST comes the closest with cards, but due to solo reasons they still have their dps spells, which has to contribute a certain major amount of their total damage.

It was a barely working and many times flawed concept in other games too. Niche support / healer classes that could barely do anything by themselves, but were highly coveted for group content. And I miss every moment of it.