they were interesting from a narrative perspective and they helped tie up any loose ends for the various city states. and as of writing i've completed the melee, caster, tank, and soon healer role quests. the reason why i felt like it was pointless was because i kept thinking to myself: "why do i need to be a certain role for this?"
now that's not to say role quests were a complete wash and are bad, i just think that locking them to specific roles serves no purpose from a narrative perspective and just feels sort of arbitrary