LARIAN IS ROMANTICIZING ABUSE.
Let's you also say they romanticise serial killers because that's what durge is. And why don't you factor in a new epilogue for the evil ending where we get two happy villains? We also have the worm, so Astarion can't control us and no we are not slaves. In fact, even the regular epilogue has a branch of dialogue that confirms their wonderful lives. I realise that some players really want to play the victim, but not everyone. It's not about Astarion, it's about you and your play style. This is a roleplaying game and you choose how to react to a particular event. Stop bringing reality into the role-playing game.
They changed this in the seventh patch because they got a lot of complaints. A lot of players didn't like it because 6 months later their game was changed. If they did that, then there were more complaints than praise. So most people prefer not to play a victim in this route.
I only agree that Astarion didn't have bdsm dynamic and they added it for nothing. We used to just have cute kisses, they could have kept them. I mean that's exactly what we had on release.