Sadly, it wouldn't be difficult to give 'the best we've ever seen' because the show dances are, imho, nearly always a disappointment. I'm afraid I cannot really see the point of spending months learning a very structured discipline like ballroom and latin, and then crowning it off with something that doesn't follow any rules.
Makes almost as little sense as learning to ice skate, and then right at the end being judged on your abilty to hang on a high wire, but then surely no-one would do that...