I'm expecting healer too, but I'm curious as to how they'll do it. The former XI addict in me wants them to be a support psuedo-healer like before, give refresh and buffs so other healer can primarily solo-heal. Work Haste, Phalanx, En-spell into their kits too. Maybe Paralyze/Slow that only effects basic attacks.
The only problem is they have to be strong enough as straight healers that you can run dungeons with them or run PF raids with 2 of them.