Just make it a normal dps job, nothing about the learning system feels like it would clash with regular gameplay, especially since they've SHOWN they can lock you out of quests/duties based on your skillset. Just make a rotation out of some of the skills and leave the rest for overworld fun.

Stop trying to stick to this vision of "BLU can only work in solo scenarios and they can only learn skills from getting hit." Just copy Khimari from X where he has to be OFFENSIVE to get his skills, let a BLU need to build up monster essence to spend on primal/high-level monster abilities.

Or keep what we have and just unlimit it, take a grab bag of skills tweak them so they have combos and just be done with it, there's no reason why we have to sacrifice an entire job to being essentially unfinished open world fodder. Let people who want to main BLU main BLU.