Uhhhh for people who think Blue Mage should have a wall built around it and stay limited how on earth does anyone expect them to get their spells once this rush is over? Without Level Roulette I wouldn't be going into the dungeons or trials where their spells at, and from what I can tell there's no way to pair that system up with party finder. If Blue Mage remains as it is you will have:

-Blue Mages missing the majority of their useful spells
-Blue Mages unable to progress through their own solo content
-Blue Mages whining about being neglected
-Blue Mages quitting the job due to it being not fun anymore

People who have tried Blue Mage know that there is no way to fully progress through the job solo. It's just not possible even with some of their "game breaking" spells. I'm sure if people have been putting up with people who don't know their job rotation in high level roulettes then I'm sure you'll survive if you get paired with a Blue Mage missing one or two spells.