I don't object to limited jobs as a concept, just in the implementation we've seen. Blue Mage is fun for a week or so, but then you realize that getting the high-end spells requires being carried through content for a low chance at maybe getting a spell. It was promoted as being "too overpowered" for roulettes, but its DPS is subpar without those spells. Even if you make an exception for bringing strong spells into low-level content, it fails, because Red Mage and especially Dancer already do that (seriously, Standard Step murders everything in early dungeons, it's hilarious) without being hamstrung by the "limited" label. The only BLU content right now is the Masked Carnival, but unless you really need Grand Company seals, it too has little lasting value. The only other rewards are gil and Poetics, neither of which are hard to gain elsewhere.

So in short, I don't object to Beastmaster as a job. I don't object to the idea of a limited job. But I do object to how it currently works.