Getting his original peck back would be cute, especially since it corresponds with the dialogue in that you give him a peck instead of the other way round.
As for the rest, I'll be the heart-broken record in that I'd really like to see his second kiss fixed for same seized characters. Adjusting the camera angle would probably already go along way to hide how uncomfortable is looks especially for male player characters. The leaked neck kiss has also made me somewhat apprehensive of facial expressions because I am not a fan of the over the top ecstatic - aka orgasm - face the character has in this "preview". It is just silly and not in the good way, especially if your character does not give Astarion nightly blood.
