Whatever your just going to keep saying that somehow a pet being super powerful and strong without any need for the master to do anything is fair, and its honestly very wrong to every other job. All jobs have at least skill ups to get stronger, puppetmaster has skills for its automaton, dragoon "levels up" its Wyvern, and SMN skills up summoning magic. BST simply pops a pet, at most it has to wear AF2 hands because they help its level, thats the most they possibly have to do for it to be stronger.
Your telling me this sounds balanced? You need to reevaluate what your sense of balance in a game is, because this is far from it. I don't want all jobs to be the same, or do the same things, I want them to take effort. No job should be able to go 1~99 without effort then do whatever they want shortly after without much (if any) work. Appealing to more players? That sounds nice, but the others who don't need that kind of hand out abuse it just as much and it makes things far to easy.