I could definitely see beastmaster getting a limited job at some point. All sorts of opportunities to be had there.

That said, I think it's highly unlikely we'll get another pet job as a "real" job. They spent multiple expansions slowly stripping away pet management from SMN and SCH because it's always been kinda janky. I think YoshiP even went on record saying they were a pain to work with.

And I think a limited job would be more interesting. That would let them run wilder with how it works, since it wouldn't be tied to the tighter balance they have for standard jobs. It could have more interesting interactions.