I think they just didnt have answers to balance it in content. I mean many/most of BLU abilities are OP, which is why I loved using them in the classic FF games.
From a pvp standpoint I dont see how it could have been implemented without completely gutting the job to have only the basic boring spells.
From a pve standpoint I dont see how they could balance the job without excluding key BLU actions or completely nerfing them into the ground to make them work with group members in both leveling content and endgame content.
From a developer standpoint and seeing how BLU in ff11 is still unbalanced and has over the years has caused several problems in game and in the forums I am glad devs at least took the time to put it in this game because I thought for sure we would never see BLU given the track history it has had in the MMO scene.
