I completely agree how the characters react to Astarion burning up feels a bit off base. This is huge moment and adjustment for Astarion. If you romanced Astarion as I did it feels even worse, you just stand there and do nothing when you should be there for him in that moment. If they want to keep it so he is running away/hiding from the sun, you should have the option to follow and help him find shade, chase after him, or find him later, especially if you romanced him! Or change the scene all together and have him leave before he burns up and explain where he is going and catch up later.
The scene “romance” afterwards is pretty lack luster for good Astarion as well. After they have the convo they could hug, cuddle, kiss or something! Or be sitting and holding each other while they have the convo, something!!
