I think it has been generally established, that after the Act 2 scene, he isn't afraid to mention if something bothers him in the relationship, so I really don't see anything wrong with the line. Though I am surprised that his kiss lines don't become less theatrical after aborting the ritual, unlike his romanced greetings, which become more casual after the graveyard scene. But I assume they wanted to keep some of that original flair in there.

If I was to make a wishlist for Spawn-Astarion it would be:

1. An alternative to the "I will always protect you" line that allows the player to show how much Astarion means to them. It should be something profound that tells Astarion how he (as a lowly spawn) has been just as important to our journey as we have been to his. I'd want specific lines for the Origins for this too. Resist-Durge could remind him of the night when Astarion talked him through the compulsion and Avatar-Gale could tell him that Astarion is the reason he is still alive (he has this option when talking to Mystra after all) - just to name the two that come most readily to my mind. I think this would be important to show that he and the player character really have the kind of partnership Astarion talks about. (And this is my top wish by a long stretch.)

2. A scene of Astarion and the player character overcoming some kind of obstacle together that isn't tied to romantic drama - Halsin, the Drow, trying to break up as a Half-Illithid or cheating with Mizora all are romantic drama for me. The Araj-scene is nice and so is the conversation about him not wanting to transform into anything again, but they are not directly linked to overcoming the obstacles of his spawn status. Gifting him the portrait would be one idea or maybe digging up a lead about some sun protection item. Though I think the portrait could be a nice emotional moment.

3. Have that angle of the second kiss fixed - and maybe in general fix musicial instruments popping up during the cinematics.


As for Halsin. In my opinion it would be cute if, when you have been strictly monogamous during the game*, you could complain to your partner about how fricking horny everyone is. In Astarion's case this could lead to you telling him that you only ever went with him that night during the party because you really liked him and not because of the pick-up lines or his looks. Wouldn't that be sweet?


* Rapture is allowed, bliss is important!