How do you feel about PvP, Crafting/Gathering, or the Gold Saucer?
There are other modes of play in this game, it's not just a single avenue, and BLU finally gave us a pve battle based one.
BLU has seen more use than any of my non-main jobs. I never play MNK, SAM, PLD, BRD, DNC or SMN, so I play BLU far more than any of those.
Like it or not, Limited jobs fill a useful and interesting gameplay niche outside of the core grind, and bring life to older content. For months between patches in Shadowbringers, me and my FC would pretty much only play BLU or work on relics in Bozja, neither of which are the main focus of the game.
BLU was great content, but that doesn't mean I don't have my issues with the job. It gave us an entirely new mode of battle which was far more reactionary and dynamic, over the rigid rotations of 'non-limited' jobs, but that's not something that I really wanted on a caster. I want to see that sort of content on other roles, and Beastmaster could give us one of them.
Ideally, it would be great if Limited jobs could pull from a small selection, maybe a caster, a melee and a phys ranged, and could all run older content together for the same rewards.
Give us a 'limited roulette' just for limited jobs while they're at it.
In addition to expanding limited job content, Beastmaster could also provide an avenue to upgrade another area of the game. Companions.
What if, instead of being the same sort of pet job as SMN used to be, it instead simply served as an expansion of the Companion system?
Beastmaster could tame new companions that use the same system as the companion chocobo, and could bring them into duties and issue them commands to execute unique moves. Meanwhile outside of Beastmaster, you could summon any of those new companions in place of the chocobo, but have them act functionally the same as the chocobo, just with visually different movesets.
You're now enhancing your gameplay with all of your other jobs, by playing the limited job.
If we get Beastmaster as a regular job, I don't want it.
It'll have one preset 'pet' that it's identity is based around, either an awkward clunky rotation because pets don't work, or a simplified rotation that may as well be on any job without a pet, and I will never play it.