First of all: I simply have no idea how people keep closing their eyes to the truth that Sylvanas was always evil. She wasn't even particularly good when she was alive and became a true monster after she died. Literally one of the first things she did was create a plague to murder the living and dead alike by making guinea pigs of the remaining bits of population that Lordaeron had and her own Forsaken.
All the Sylvanas minions in this Forum just try to deny that when every and all stories about her clearly show that she is a monster. Edge of Night, the Lich King book, that story with Nathanos and his cousin... and and and... the evidence is literally overwhelming.
BFA Sylvanas was never in any way out of character, her actions fit her perfectly. So much so that when the first pictures of burning Teldrassil went around people thought it couldn't be done by Sylvanas BECAUSE THAT WAS TOO OBVIOUS. Turns out creative stories with twists just aren't Alex's thing. He just put the bad guy in the bad guy role.
BFA had some really good stories, the Jaina one for example. Many people just hate it for dropping the small pretense that Sylvanas could ever be anything but a psychopathic monster.
Secondly, if this whole thing shocked Metzen and people (which is doubt, he has never tried to hide Sylvanas evil nature) then I just do not understand why they are doing it YET AGAIN by giving Danuser full control of the story and letting him twist literaly all of past and present reality so that his waifu can be redeemed.
It's a pathetic story of one man against the entire established lore for the sake of his favourite character and they are just ignoring it completely. Shadowlands is ruining lore as far back as WC3 for this one reason and no one at Blizzard seems to mind.
Well, maybe someone. if the rumors are true and Christie Golden had a huge falling out with Danuser about this subject which made him ghost her for months and hence why the Sylvanas book that was supposed to have been released months ago is still not done. Frankly this is making by far too much sense. Sadly Christie has no power over Danuser or his decisions whatsoever.