I know writing fiction is hard, but as someone who gets paid to do it, I can say that the requested 'I just want to be with you' line specifically would go a long way to hammer home how bad the situation actually is. Do you know why? Because the player would have just given Astarion the perfect thing to use against them to get them to agree to be his spawn. He would offer to turn the player like he normally does, and if you so much as hesitate he can slap you in the face with 'but you just said you want to be with me', and now you're stuck in a situation where you either own up to wanting to be with him and let him turn you, or he breaks up with you and gets to call you a liar because clearly you didn't mean it if you don't want to be his spawn. So I don't see what the problem with this change is to you, since it keeps the abuse narrative going in a very effective way. It's actually more effective than anything we have right now, soo... yeah.
That’s your interpretation, not everyone views Astarion’s ascension as continuing the cycle of abuse and I certainly don’t view it that way.
What we’re asking for is representation because our narrative has been pushed into a corner of ‘glorifying abuse’ and ‘continuing the cycle’ and all this other nonsense which has absolutely nothing to do with why we chose to ascend him in the first place.