If they were to do a Beastmaster job. Basically have two routes they could take it with a highly unlikely third

1) limited job like blue mage but also super crazy can do everything with no real limitations like blue mage
2) Sort of like how summoner is except a melee job with some personal melee attacks and skills to order the pet to do special things and release bigger monsters for flashier cooldown skills. Perhaps main pets could be like fairies where it's a choose your favorite skin type of deal
3) the unlikely would be #2 but still have open world exclusive classic beastmaster stuff

It has always been a pretty cool job concept even when it's not implemented super well