My problem has nothing to do with player sexuality. It is a lack of any kind of build up to the moment. There's no real flirting, teasing, joking, or relationship building. It literally goes from 0 to 60. The most flirting that is done is Gale hitting on Shadowheart when you first meet him which goes against flirting with the main. My first thought was, "Okay. Those two are off limits. They obviously have something building there. Next."
But then, nothing. Then suddenly, "Let's bunk tonight."
I recall KOTOR. Now that was fun. What I liked about it was you had to work at it, banter, etc. It built up to a point in the game when it made sense for the romance to reach the fade to black moment. It wasn't just a bam slam in the moment out of nowhere thing where everyone in your party is like, lets go baby.
I wouldn't mind a character initiating something, if they'd been building towards it already and you were reciprocating. This, however, is not that.
I'm tired of talking about it, but...
1. It's EA 2. Astarion have at least 1 flirting scene 3. there are more cut scenes with the possibility of flirting. Larian just didn't added this in game yet. but these scenes are in files.
So I believe that flirting is not something we need to worry about.