If Dragoons had been a tank class and retained their Jump abilities, you can be damned sure there'd be a hell of a lot of tanks in this game.
It's not really about the role. People buy into the concept of class archetypes, and an MMO character is an extension of the player.
They can get more tanks by re-designing tanks to be more fun. Right now due to the long GCD and nearly every ability being linked to it, they are more frustrating than needed.
-End-game boss cast times tend to be shorter than the GCD. This means Shield Bash cannot be used to interrupt if I am doing a Halone combo to maintain threat. I can't react, and that is frustrating.
-Even if I do get the ability off, nearly every time the boss is immune to stun because other DPS classes have been spamming Stun as part of their own rotations.
- Paladin DPS needs to be increased, leveling up 1 to 50 is incredibly frustrating due to the low DPS. It doesn't have to be the same as a DPS class, it just needs to be better than it is right now. I don't know why Sword Oath is an auto-attack buff; Blizzard tried that auto-attack DPS nonsense 30 different ways with WoW Paladins and finally had to admit it is stupid design. With the amount of movement needed in this games, ability created burst damage will always be superior to auto-attack, both in practicality and in fun factor.
-Halone combo needs to be tweaked. Forcing Paladin to go through 3 GCD before they generate a spike of threat is dumb. There needs to be a way to generate burst threat other than spamming Flash (which does absolutely no damage). Fast Blade and Savage Blade need an increase in their enmity modifiers and/or increase in their damage, or both.
-Tanks need to be a little more iconic to the Final Fantasy universe. White Mages, Black Mages, and Dragoons are very clearly iconic FF classes, but Warriors and Paladins don't have any ability that screams "Final Fantasy" to veterans of the franchise.