I wonder if Templar will be introduced as Tank with the Ishgardians (would make sense) alongside Dark Knight as DPS class (Melee Caster?).
I'm sure they are not going to push away the Gunner any further (that'd be a huge slap for those who wanted the class) - which leaves Gunner either evolving into the mystery healing class or we'll get another healer from Ishgard (possibly Astrologist or something that evolves into Time Mage or something similar).