And both are some of the most horrendously boring gameplay experiences in the entire game. Personally, I've long found the whole "playing as the scions" novelty having long worn off and dread every time we suddenly switch to them. Granted, this is purely from a gameplay perspective. Storywise, I genuinely like several of those segments.
Nevertheless, we won't necessarily ever get to that point even with combo consolidation because of oGCDs unlike the very limited action suite Thancred and the like have. If we did, I'd likely not be playing.
It doesn't have to happen ever though. Look at jobs like Dragoon, which have simply upgraded long old animations ala Full Thrust and Chaos Thrust. Not to mention, several jobs have far too many throwaway abilities that still haven't been pruned away. It all depends on the direction they go and how many new abilities are actually added. Endwalker didn't really add much of anything for a good number of jobs. Although, ironically, it bloated others. Suffice it to say, they've been rather... inconsistent.
To be fair, the leveling experience being so abysmal has more to do with them refusing to readjust when jobs learn their abilities. Bard, for example, wouldn't even benefit from any consolidation as it (like all the prange) have a barren hotbar suite. And yet, the leveling experience borders on healer levels gameplay with the sheer amount of Straight Shot spam you do. Bard doesn't even get it's main song until 52. Frankly, I'd been fine doing without new abilities entirely if it meant cleaning up the existing jobs come 7.0. Or at the very least, simply sticking to animation upgrades like the aforementioned Dragoon example.
Almost none of these are good examples though. Blood of the Dragoon and Enochian were essentially nonexistent for decent Dragoons and Black Mages. They only impacted inexperienced players who weren't yet accustom to the job. Likewise, you even cares about Sleep, Sic or Fluid Aura? All were completely worthless. Seigan was little more than a meme.
Really, the only major examples here and Monk and Summoner. However, they didn't so much as lose abilities wholly redesigned from the ground up. It really isn't a fair comparison. You'd have been better off mentioning DoTs or Bard's loss of Foe's Requiem. Stuff like that actually impacted these respective jobs. What you listed largely did not.