There are lots of ways I could bear to see Buffy having sex with Angel. He could leave W&H and go to Sunnydale and they could get to know each other in a real way. She could deal with his mistakes and his son. He could figure out who she really is now. Their long standing sexual attraction could kick in. They could even live happily ever after.

Not the story I'd want to see written; but not a story I'd complain about either. It'd be a grown-up story. Not just more Twilight crap, which is what the story threatens to cash out as if it goes the way you seem to think it goes.