What surprises you about the fact that the mother and daughters stay together no matter what? Especially considering the fact that they really do have a lot of common interests. (Well, mb except for the revolution, which remains unclear, but the fact that V knows about it tells me that they will resolve this issue within the close family circle one way or another).
BTW, things are not so simple with Yvette, and if you look, for example, at the Dom section of the faction sheet, Yvette does not appear in any of the factions as an active member or leader...So who knows what fate awaits her...
Be that as it may, each side (Dom and Sub) will have its own canon ending (according to the dev), and I don't understand why you are so concerned about an ending that is “canon” only for future TQA events. It's a different game, and in the context of the history of KG world, it doesn't concern us at all.
