Wait you seriously can't dump Minthara if you agreed to romance her? That's hilarious.
But honestly even if the abusive relationship thing is intended (and I actually feel it kind of might be) it's too hamfisted with the over exaggerated clown expressions. It's cartoon villian yelling "I am the bad guy!" level. This is a game for adults not children. I don't need childlike "this is bad" messaging.
That said I'm fine with optional expressions. I would prefer it be locked to you picking dialogue options that say you're afraid of him or what not. (and it's a one time toggle).
Honestly I'd vastly preferred if the abuse angle is intended for their to be *dialogue* about it. Kiss clown expressions are not it. I'm an adult let's have some adult conversations about it please. (In game I mean).
Like you can't even turn Astarion down during the turning scene because you don't want to be his slave. Like why on earth given the spawn conversation can I not literally say that as a reason to reject him? Instead it's crying about him being Cazador (which I despise because PC knows nothing about Cazador outside of Astarion's filtered information. It's such a vile and ignorant thing to say).