The only thing I'd change I think is making the glam unlocks be linked to traits rather than directly to level.

For instance leveling Warrior to 50 would unlock 'Fending Mastery I' and unlock all tank armor 50 and below for glamour. The main reason would be to encourage the 'wanna glam it, play it!' idea and stop people bypassing most of the playing it part by getting what they want by doing the first quest for an advanced job and stopping there.

Gunbreaker could have a similar trait of course, but at level 80.

PLD and WAR: Fending Mastery I (l.50) II (l.60) III (l.70) IV (l.80) and V (l.90).
DRK: Fending Mastery II, III, IV & V.
GNB: Fending Mastery IV & V.