Since so many people are split over weather or not to have the pet, why not have it be a choice you make at the start of the job quest? As a LNC you start the quest to become a DRG. You end up having to make a choice at the end, kill the dragon and Lancet its power for yourself (trying to use lancet in a cleaver way) or take on the dragon as your partner, but not being as strong personally. This way we not only get more variety in the job, but both sides are happy.

Of course im not sure how much time this would take, but if it was possible, i think its the best choice, be a dragon slayer, or a master of dragons.

and just a side note, please do not instantly compare it to FFXI's DRG, this game plays differently and Yoshi could easily think outside of the box to make it a different experience.