If the devs do decide to make Dancer, I'd hope its not a DPS+frontline healer like some people are asking. I seriously doubt they would want to balance fights to be viable for both healers that can keep a distance and healers that need to be right up there next to the tank and melee to perform optimally. Things like EX Ifrit's healer debuff need to be eliminated amongst other mechanics.
And you think the healer DPS arguments are bad now?
Its one of those things that just-because-XI-did-it-doesn't-mean-XIV-could.