One minor criticism

[Zfz]

I don't think we're ever going to get specializations. It's already complicated enough to balance so many jobs, adding specializations would double or triple the complexities and work required easily.

But even if specilaizations ever come, I doubt we're just gonna have the tanks as-is but with DPS-appropriate dps numbers, because tanks have the second easiest dps rotations in the game (the easiset being the one-button spam of healer) and such big utility (damage reductions, invulnerabilities, etc) it's unfair to the DPS jobs. And if those tanks have their skills and abilities adjusted to match DPS jobs, then they're not the same jobs, they're just new jobs that happen to wield those same old weapons.

And then the practical question of ROI will inevitably be asked: is a properly all-new job a better investment of resources? Or is a half-new job with old existing weapon types a better invesment? Common sense says it's going to be appealing to more players and potential players to build new jobs out of completely new weapons.

[Vahlnir]

WoW has proven time and again that class/job specs are a balancing nightmare. Let's just...not, please.

[Ryaz]

The problem with the specialization system is that it then makes game balance even more of a nightmare. FFXIV is probably the most balanced MMO out there, despite the doom and gloom from some, with usually just minor tweaks needed to bring jobs in line. A game like WoW with all it's specializations has huge gaps in balance where some classes are just conplete jokes because they're so far behind other classes.