Since Dragoons appear to play a big role in the next expansion I have a suggestion I hope that the developers (and players) will really take to heart:
It's great that Dark Knights will be a tank spec. We need more awesome iconic classes to be tanks. The game has enough DPS classes and there needs to be some balancing out with more healer and tank Jobs.
But I imagine that Dark Knights will need to be leveled up from 1 to 50. This won't help the queue times at patch launch. So I suggest that a 2nd Job be added for Lancers: Holy Dragoon ( Kain's class upgrade in FF IV: The After Years).
The quest requirement could be to already have unlocked Dragoon and be level 50, and also have level 15 in Conjurer.
Think about it. If every current Dragoon player had the option to do a 20 minute quest to unlock a tanking spec, the nightmare queue times on Duty Finders (over an hour these days) would probably vanish overnight, as people who already have a Lancer at level 50 would not have to re-level a new class to become a tank. That is the main hurdle to solving this issue; they have to grind up from 1-50 all over again on a class whose playstyle they might not enjoy. But Holy Dragoons would still use the same basic rotations as a Dragoon; it's essentially the same class just performing a different party role.
Plus those players who really love the idea of being a Dragoon would not need to abandon being a Dragoon in order to roll as a tank when necessary.
Holy Dragoons could have a toggle buff that, similar to Shield Oath, dramatically increases their threat generation and damage reduction while decreasing their offensive damage. Give them a few defensive cooldowns unique to the class, and allow Gladiator and Marauder abilities to be cross-class skills (Provoke, Flash, Foresight, Mercy Stroke, etc -- also use Stone-skin, Cure and Protect from Conjurer) and allow them to wear tanking gear.
Holy Dragoon players would become effective tanks with these slight changes, the extremely long wait time for DF queues would vanish AND it would fit in line with the idea of the new expansion.
I really hope the developers seriously consider doing this!