Parvati and I are nothing alike, but I totally got the bonding over kids conversations thing. Before kids you had to find something else in common, after kids anyone can relate.
I figured that Amber had to go. One of them had to go. You can't have two people who obviously will never separate in the game (or hopefully ever). I get that people do form bonds with strangers within the game, but part of the game is hoping that they have your back and gaining that trust. Rob and Amber don't have to worry about each other. As Rob said, it was pretty hypocritical of him to vote out one half of a pair.
I don't think the players yet know how the voted out players can affect the game which does add another layer of strategy to the game. I'm still not convinced playing with the rules is a good or bad thing. After all, they're all winners, why not mix it up?