You didn't want Blue Mage, you wanted another job. Blue Mage sounded fun, but you were never actually interested in Blue Magic. You wanted to learn your skills through scripted quests. You wanted all your skills to just be part of a rotation and for it to be balanced against all other classes so you could take it into raids. This could have been any class.

Blue Mage has always been a niche class. It doesn't appear in a lot of Final Fantasy games and you could see how surprised people were with the AF. It seems like a great deal of people who were upset at this job being a "limited job" didn't realize that the AF matches it's original incarnation in FFV.

SE is coming up with a really neat idea here. They're creating a class that's completely original to level, completely original to gain skills, completely broken for normal game content, and you're all getting mad for it. The way this game is made, you could not keep BLU true to it's form. This is the only way BLU can be handled in this game and it's a fantastic way of handling it.