The post-ascension conversation completely destroyed my immersion and was the most difficult dialogue to get through because none of the selections were remotely tolerable. Where is the option to say
'You don't have to do anything for me, I'm just glad he won't bother us anymore and we can relax now. We're finally free of him." or "I think we should toast to our victory. I've been saving a bottle just for the occasion." or "We could go for a midnight stroll in some dark alleys and look for trouble. Not like I'll have to worry about getting hurt with a mighty vampire lord by my side." ?
I don't want to ask to be turned as a form of transaction and especially just after dealing with his personal problem, I don't want to lust over his body to trivialise a crucial moment in his and Tav's relationship, I'm not angry about being called a 'pet' again and after having heard him use so many names already (at this point to me it's just an Astarion thing; he even has a hilarious banter with Lae'zel about pet names, where he teaches her some of them and they're all related to food) and I don't want to lecture him after being cautiously optimistic yet fully supportive of his ascension throughout the game. The moment after the ritual we can tell him he's magnificent, cheekily say we're not afraid of him, tell him to embrace his powers, express relief that Cazador is gone. These are all positive or neutral options. However, as soon as we go for a long rest suddenly Tav gets cranky, obnoxious and confrontational. It's pure nonsense!
When we compare it to the spawn conversation it's obvious the game is trying to raillroad us into breaking up with the ascendant and hooking up with spawn Astarion. Clearly the author there put all Tavs in one bag, assumes selfish motivations on the player's part and wants to send them a message. It's not only preachy, limiting and lacks continuity but it's also downright contradictory. On one hand the game is telling us 'this is a bad thing you did there, you know, just look at the a-hole you are', while at the same time rewards us because AA has more dialogues, more comments, his behaviour is consistent and it's a logical conclusion to his story.