Suggestion on how new classes should be added

Hello Everyone!
I'm not sure if anyone has suggested this already, but I had a thought on how new classes should be added.

I recently played Final Fantasy Tactics on the PS1 a couple months ago and thought that the job system there would work well with the current job system here in XIV.

How it works is that you have to level one or more jobs to a certain level (in this case, rank) to be able to unlock new classes (maybe add a quest also?).

For example, to unlock Dark Knight, you need to:
Master Knight
Master Black Mage
Level 8 Dragoon
Level 8 Samurai
Level 8 Ninja
Level 8 Geomancer

Or in FFXIV terms, it could be, achieve:
Lv 20 Gladiator
lv 30 Lancer
lv 15 Thaumaturge
lv 15 Conjurer
lv 15 Marauder
etc.

What do you guys think?

Edit:
I just saw a post similar to this, sorry!
I should have trolled the forums more.