I'm referring more to how there is no real romance before the party and then all at once it's like BAM.
I get Lae'zel and Astarion. I also never triggered Gale's. Honestly, I could have triggered romance with Shadowheart but feared some steamy scene. So knowing they aren't all that way is better. Wyll's convo was creepy to me. I got total bro vibes from him and then, "Let's bunk."
But ultimately it feels forced because like I said, all at once. If Shadowheart maybe wanted to meet alone to share her secret, and have a romantic interlude, Astarion maybe tried to tease if you let him bite you, little moments of romance throughout, that would make more sense.