So because you loved it, it has to absolutely be in the game....
The thing about PUP is that it was mired by poor design and lack of balancing. For example, maneuvers wouldn't really work here because combat is faster than FFXI's (not to mention the concpet of maneuvers were sort of modified to create NIN mudras). Then comes the issue of how strong the master should be. PUP when originally implemented was very weak since their pet was supposed to be the stronger of the two. It was when they discovered the job as a whole was a joke that they decided to buff the master and give them access to the stronger HTH weapon skills. Valor Edge and the ranged one for a long while were useless next to the caster automaton, largely due to PUPs using ADA to get around the recast timer inherent to pets (this is one of the few instances where the job was competitive DPS-wise; exploiting the system to get around recast timers).
PUP was essentially BST v2.0 community wise, and while some may be willing to sit through that for the sake of being different/special, it's not a good thing in the long run. You're welcome to give suggestions on how the job could work within the current game, within the current systems in place. I'm half tempted to cook up a suggestion myself just to see if the job can actually work and gauge how much the concept would have to change to be a non-joke job.