The problem with trying to make BLU hybrid is the gear. All the gear in the game is tailored for specific roles; you'll never have a tank use gear that boosts magic related stats, even if they can use Cure. You wouldn't have a DPS use gear that boosts physical strength when it's not their main focus. To have BLU be able to do all 3 roles at will means the developers would have to spend quite a while making gear tailored for each BLU "stance". You don't want someone playing as a BLU tank to be using gear that doesn't enhance their tanking abilities. There's simply no piece of gear that would allow a player to hybrid their class because of how the stats for each job works.


There's also the problem of balancing, especially in PvP, with all the spells for each "role" the BLU has.