Astarion is the first NPC to be open about it. He was starting to get too cozy. I figured he was written that way. besides, as a Vampire, getting close to you is his main ticked to a pretty neck.
I'm at level 3. Shadowheart and Lae'zel have made no advances. Also I don't have Wyl's dialogue options to start hitting on them. So far, all the NPCs are neutral to me.
As to the argument it's too early, I figured Larian wants to entice the player of what's to come with the main game.
