Astarion: 'I - I can't feel the tadpole. It's gone - we're free! And I'm still standing in the sun. This is incredible! Maybe whatever it changed in me was permanent?' This is the first thing Astarion says while looking happy and hopeful.
And then he has to flee the sun in a way I can only describe as cruel. We (the player) spent hours and hours to bond with this character, deal with his problems, defeat Cazador, help him realize, he's a person, he's loved (dearly by a lot of us). Only to have his and our hopes crushed. I honestly can't understand, how anyone could think, it'd be a good idea to have him scurry away like that.
Somebody thought it was funny. While Karlach gets treated seriously and with respect.
I suggest posting this in Larian's Discord feedback channel so they can't pretend they didn't see it.