I also support this idea to get a possiblity to have a better 'sun scene' with Astarion.
In my 1st playthrough I was not a big friend with him, as a rogue myself, I have never had him in my group and I have even missed most of his personal quest, so the ending seemed somehow appropriate.
But now in my 2nd playthrough I am romancing him and if I imagine, that the ending scene will be completely same... It is just so sad and humiliating for him. He had so much growth as character during the game, especially if he rejected the ritual and all he gets in return are his companions (and lover) just standing there and making fun of him. Yes, he is basicaly 'evil', but even in this case, if the player is friend with him or even a lover, this is such an awful scene... Would be really nice if Larian took this in consideration.
