Probably an unpopular opinion, but letting Blue Mage into exploration zones would not be good. It would be amazing for Blue Mage, but completely disastrous for the gameplay ecosystems within Eureka, and Bozja. I think a lot of people underestimate just how strong Blue Mage is at base so to give is access to haste gear, and Logos/Lost actions would beyond break it. There are already super overpowered job, and action combos that certain players use to grief other players so I think it could make the instances unplayable for anyone not playing Blue Mage.

Aside from that, I'm totally down for creating pvp opportunities for limited jobs, and letting them into like deep dungeons or something. That would be fun.