How much of the AST's lore/class quests is still true as of ShB?

I missed the boat in stormblood when I first picked up healing on SCH and fell in love with it, and don't have the heart to level a healer from start to finish with ShB's soulcrushing boredom for the role in general, but I'd heard nothing but good things about the class quests from a close friend who mained the class (and monk. you can guess why they've since left the game)--talking about in-depth explanations for each of the cards, along with fancy art to show off, descriptions of the timey-wimey effects like lightspeed and dilation, touching on omens and choosing the correct sect/path toward their preferred future, and so on. as well as leading into geomancer possibly? but we've seen how that turned out.

How much of the class' lore information is still accurate for their actual gameplay at this point, since they've effectively lost their cards, all their time-related spells, and now their sect mechanics with the shift to "pure" healer status? is there any means to address these changes now that class quests have also been effectively removed (aside from a small check-in at the capstone level to... gloat about your exploits, i guess)?

I usually start such analyses with two big considerations: "Sometimes gameplay/lore segregation is a thing." and "Sometimes, the traditions we're taught aren't the boundaries of potential." (See: Y'shtola, whose range known spells is all over the place.) My take is that even if it's not reflected in calculations and dice rolls, if the text is still there, it's "what's happening" and sometimes we may need to give the battle team a little wiggle room, lol.

As a fellow SCH, I mean... <gestures at Eos / Selene>

We'll go one by one

-cards definately arent. You learn this during the quest to unlock ast
-Royal road had a tiny dialogue change where jannequinard forgot the lesson he was supposed to teach you
-still nothing on playing a card. Why this button bloat happened is beyond me
-gravity is disaligned from its quest, very weird, but unless ast gets a damage rotation, welcome i suppose to the poor souls who play it
-see that huge deal about time dilation? pfft. you get nothing
-collective unconsious is hard to call if it fits or not.
-last i checked, you picked a sect as you were using the model of stars and their positions. Neutral sect therefore does not work as there is no such diagram of stars. If it did, it would do something different than regen/shield
-horoscope and divination are redundant lore wise. Because we're already reading and ascribing fate when we draw the card.

To sum up, I think the only bit that is still relevant is the lore around malefic