I wonder if Elizabeth was more annoying around camp than the edit was showing. I know a couple other players had mentioned she had know/done-it-all tendencies and it may not have been hard for the Davids to cut the fat.
I can't imagine her being even MORE annoying. We do a survivor draft with some friends, and my wife picked Elizabeth first overall. I immediately called her out for picking a goat, because Elizabeth had already showed cards as being super annoying within the first 2 episodes.