My biggest issue with the crossover is the absolute incongruity in the worldbuilding in acotar and CC.
From the start, CC was an infodump of worldbuilding. Absolute mess of information, and for some people that was great and for others it was meh. There is no denying that the worldbuilding in CC felt like she was playing with that and seeing how it went.
But we've been going with acotar for years now, 4.5 books, and all of a sudden we are going from "*shrug* idk it's the Mother or something" to an 800-page treatise on the history and magic of Prythian?
What the fuck?
And the fact that in this video, every example she had of "hints" being planted beforehand were from ACOSF. This has not been planned from the beginning, this clearly came out of nowhere (the Dread Trove and Gwydion were never mentioned before acosf, and if anyone can find foreshadowing of them then I congratulate you) as an exercise in "what if I did this". She decided to make these connections later on, and then said "hm, what do I have so far and how can I make it gain relevance that it never had before?"
Am I going to read? Of course. Am I annoyed at the lack of planning that people will take as her being a genius just because she decided to connect random dots years down the road? Yes.
SJM told people she wouldn’t bring the worlds together either, which is the first thing that felt off about this supposedly being planned from the start.