The way they portrayed the story, the way they animated it does not fit the narrative of the main writer or other interviews/statements of the people who are closely involved with Astarion. That is the main reason why the parts of the animation that are shown do not match even the written text or VO of the character. The way it looks now, it doesn't fit the narrative at all. So, put simply, no Larian. Whoever made this choice for these animations for the Ascended kisses, does not understand or does not approve of the way we played the character. Hells, the other "evil" (and I hate describing any character that way because there is no such thing as a pure evil character that is not an elemental in DnD if that is what you are basing the game on) characters such as Minthara did not get a suddenly abusive type kiss. Here you have a vampire lord who is saying, "Yes my treasure" while smiling and swinging his arms to choke, kiss, and shove while on their knees in front of the entire world? They may be "evil" characters, yet the one person who helped him achieve what they wanted would not be animated like that and then go back to being a "dark romance" afterward. It does not fit how the character was the entire game nor does it fit the VO of the character. Just my opinion.
I think Astarion's animations are very in character and fitting for that route. It also fits what few official statements we have seen about Ascended Astarion's romance. I agree Tav shouldn't look scared (not that a Tav couldn't be, but this is specifically a Tav that's already gone through the kneeling scene, so they know Ascended Astarion's deal and accepted it at the time, and is then asking for a kiss, possibly multiple kisses, so it's unlikely they'd be looking scared.) Minthara's story and the themes it tackles are very different, so it makes sense she has a "evil power couple of equals" kind of romance instead. But Ascended Astarion gets a very explicit insight check where you discover he thinks you are degrading yourself by agreeing to this relationship, and also states if broken up with that he would have ruined you until you were nothing. More fundamentally, this Astarion route has him seeing everything in terms of power and control, so of course he's going to want to have power over you. It's why he turns you into a spawn in the first place. His animations are definitely adding up with the story Larian wanted to tell with his romance.
