I suggested an alternative to BST a few months ago that changes what Beastmaster is, that may upset BST people, but it would prevent it from being a limited job. The summary is that XIV's BST would be more akin to Monster Hunterish job with a moogle pet. And, rather than taming wild beasts to use in battle, they'd capture them as part of the lore. Having a Moogle "pet" acts as an assist with at least three unique commands, the rest being your weaponskills and such.

The Bozja BSTs have axe and shield, so if it ends up a limited job it could function as a tank with a pet or a DPS with a pet. If a full on job, I can honestly see it being more of a tank.