I read the books, and genuinely cried when Regis appeared out of nowhere. He was such an endearing and fun character in the books, which made his death feels very sad. Meeting him again in the expansion really feels like meeting old friend, and the game conveyed that perfectly
I'm just happy Geralt and Yennefer finally get to retire in peace, in a stunningly beautiful land. That, after having lived hard lives for decades, saved the world, and somehow managed to raise a daughter who will soon be Empress of Nilfgaard... I couldn't be happier for them. They deserve it.
It was explaned why deathlaff left syana when be discovered that she was the one manipulating him. He didnt want to make a rash decition because he was emotionel, he wanted to cool down before talking to her. Regis explanes that vampires are sorta kinda like animales that react extreamly when it comes to love
That magnificent little final moment of the end cutscene with Regis about deserving a rest, where Geralt looks right at the player and smiles,... after hundreds of hours with this character,... that almost makes my eyes leak (certainly lump in throat territory). Bravo to CDPR for giving us that farewell (I'm gonna 4k play that and screenshot it for a background)
the part about Dettlaff acting emotional and out of character isn't actually true, he was always very emotional, Regis confirms that vampires feel a lot more intensely than humans do with all of their emotions and Dettlaff has always been an overly emotional being even for a vampire, so I feel it's very reasonable to think someone as smart and manipulative as Syanna can take advantage of that, As for the scene with both of them, you're not taking Dettlaff's emotional state into account, he thought he was hurt before and took action but now that he knows the actual truth he's hurting on a whole other level, much like a human that does something harsh without thinking at the moment, Except Dettlaff does that even more intensely cuz he's way more emotional and emotionally vulnerable than any human, so it would make sense that he wants to make everyone hurt, not to mention killing Syanna doesn't really do much to her, she already knew the risk and accepted that.
"Overly emotional schoolboy. It's dumb." That's literally his character. He doesn't process emotions like mature humans. Even Regis mentions that Dettlaff (and vampires in general) feels everything more strongly than humans
Another thing that makes Blood and Wine such a wonderful sendoff is that it comes full circle, referencing Witcher 1 in ways that have been entirely ignored otherwise. For example, nearly all of the enemies in this DLC, such as Barghests, Bruxa, Garkains, Fleders, Kikimores, Archespores, Echinops', etc were originally seen in Witcher 1, and haven't been seen since. Also, The Lady of the Lake is back and offers Geralt Aerondight, arguably the best endgame silver sword just like in Witcher 1. The Aerondight quest is especially neat because it ties into Toussaint's "chivalry" lore so well: to get the sword, you need to "embody the five virtues", which can be done by making certain choices during other quests present in the DLC. This is such a cool touch that I'm surprised you didn't mention it in the video.
"the fact that he's been fooled and manipulated so easily by Sianna is hard to believe. He's an ancient vampire..." I think this was intentional, to show the power of love.
Deattlaff true nature as a high vampire (beast-like instincts and feelings when enraged) is what brings him to the decision of making that threat . He knows about it and act accordingly . When he finally found Syanna and figured out what happened he was about to kill her , but because of the fear of acting solely on instinct he wanted to wait at least a bit of time . The burning the city part was only there as to say "You will not run away at all costs" it wasn't a punishment for humans ( and honestly at that point , if syanna run away he would have turned in to a beast anyway ). Syanna herself killed the people who she thought betrayed her during her childhood , it's not like she would have accepted the destruction of the city only to save her life . I don't think this part of the story was too unreasonable .
Geralt DESERVED a happy ending, and so, that is exactly what he got, a peaceful semi-retirement alongside Yennefer, their adopted daughter Ciri stopping by now and again, inside of a country that treats them with deserved respect, and owning a vineyard.
The massive amount of top-tier content supplied by this DLC is remarkable. It's full of new assets, new engrossing stories, a lot of well-written new characters, and offers so many new things to experience both in terms of quests and exploration. Blood and Wine is so ambitious and generous, that it's on par with what many other game developers would release as its own stand-alone game at full price. It puts most other DLC's ever released to shame.