I really doubt SMG would have agreed to Buffy's relationship with Satsu. She was shocked when a fan told her about the storyline at the Paleyfest, and I don't think she would have let that fly. I'm not saying SMG is in any homophobic, I would never say that without proof. It's just that she is kind of protective of Buffy, and I think she would have reacted like the rest of us did...it was just too out of character for Buffy to jump into bed with Satsu, especially considering the previous issue when she told the younger Slayer that there was no chance of them being together.