I am against Limited Jobs.
From a creative standpoint, it's an interesting concept, and I'm glad to see SE pursuing new endeavors. It gives me hope for the future of the game, that they're willing to try new things.
Coming from WoW, when I see special jobs--which, by the way, that's what I feel they should have called the Blue Mage: (Specialized Job), not (Limited Job)--I expect to see something crazy good and insanely fun, like the Death Knight was in WoW when it first came. Blue Mage could have been molded to fit as a fully-functioning job in the FFXIV universe, and I've long since gotten the feeling that SE implemented it ONLY because of demand, and not because they truly wanted to. Heck, they even playfully (?) added in a tooltip at the start of Stormblood, something along the lines of, "May it help you forget about Blue Mage."
My reason for taking a stance against limited jobs is because I desire to play a DoW/DoM job with equal access to all DoW/DoM-related content, including the level cap. I cannot put into words the high hopes I had when BLU was first announced, and how they were quickly dashed when I saw that they wouldn't have the same access to the full aspect of the game as other jobs. That said, Limit Jobs do make for great pastime on days you don't want to do anything else. I empathized with that on the first week of BLU, and then I just forgot about it entirely.
Furthermore, I feel that limiting a great job such as Blue Mage, and any other jobs that may be in the works), is also an insult to the fan base. What if any of the jobs we currently have came up as (Limited)? A limited Dragoon? A limited Paladin? A limited X, Y, Z? Sorry, but no. That is a putrid and disgusting thought.
Please, Square Enix, reconsider (Limited Job). It's not good for FFXIV.