Talk me through how you would change Dragoon's kit so that it could fulfil the role of tank?

Which jobs can you see being a healer? It's easy to see which jobs can be a tank or DPS, but not so much healer. And then, how much of a job are you changing to allow them to become a healer?

What about equipment? Do you need a different set for each spec, or can you use the same pieces of gear?

Depending on how much changes, would it not just be better to create a new job with all the work that is being put into it?

Really, I would prefer they keep jobs in their own roles and just add new jobs to bolster the roster. Not some, what I will assume, half baked attempt to force a job into a role it was never designed for.