With all the content up to endgame content they view as training you how to play your job. As someone who on another account had all jobs to 80 in shadowbringer I agree that the jobs start to feel like just a new coat of paint so are the new jobs every expansion necessary? I thought at one point that the extreme trials were supposed to be the in that slot of endgame between regular raiding and savage raiding but now a days it is often hard to find people to do those fights with as people just wait until the next expansion and do them unsynched if they want that particular mount. One thing I would like to see soon is for there to be relief of button bloat on some jobs. Maybe it is just me but sometimes it feels like I don't have enough fingers to hit all the buttons that I should be hitting and with this game possibly being played on controller this problem must be resolved if they want to keep controller support active.