Seriously, I think this is a quality-of-life improvement that I cannot imagine ANYONE disagreeing with.
Furthermore, once you've complete it for one Job, perhaps subsequent jobs could simple a "shortened" version, equivalent to a single book's effort now? Or even JUST have us do the Enemies and Dungeons (the Leves and FATEs are insufferable, because they rely on some element of luck or sheer time).
I don't think they really need to do that. Just let us do them all at once. There's a lot of overlap so just by clearing FATEs as they show up, for instance, you'd clear that part fairly quickly minus the random stubborn rare ones. I did them recently on an alt and I remembered how frustrating it was to have done a FATE while clearing for another in one book that showed up in my next book.
I think the past relics in general could do for a little more trimming to progress steps since for most people these are just glamour acquisitions now