Think they've left behind a lot of content behind with the strict trickle of a new skill or trait ever second level after level 50 and that jobs only feel complete at what is currently max level for the expansion. I used to find the game engaging on two fronts: what I need to react to in fights and the playstyle of the job. If the fights demand a lot of attention (Extreme, Savage, Higher floors of PotD/HoH) then that can carry it on it's own as I need to work to find oppertunities while dodging. Playstyle is what I could fall back on when the I was overtuned or very familiar for a fight or Duty, something simple that would be enjoyable through sheer catharsis.
In order to reach Extreme, Savage and Higher floors of PotD/HoH I find myself spending a lot of time where the first front isn't applicable: Low-level Duties or lower floors that any group in Duty Finder easily gets through. With many skills and cornerstone abilities locked away at higher end of the max level spectrum these daily grinds turn into more of a chore than I already find them. Would very much like to see them rebalance the whole thing so cornerstone abilities are learned much earlier, like before Sastasha. It would be even easier and one might've gotten both daily tomestones and endorphin release of blasting packs of mobs.
That they haven't I find particularly aggravating for my former favorite job, Scholar, that I could take to any solo quest or low-level Duty and the least I'd be able to play with several dots, go more offensive with Cleric stance and see how much healing I could get away with not doing on Eos' part. Then when it was time to be serious Extreme, Savage or deep in Deep Dungeons or suddent triage in low-level content I'd still have the full healing and support set suite of skills to perform the role. Job still comes alive in absolute emergencies and during some pulls, yet I'd much rather see every job be fun in the majority of the content the game has to offer rather than a tiny portion found a max level.