Carol I think you're absolutely right about Denise taking the heat off Jill - it seems that every year there has to be a female contestant who is scapegoated for her "over- professionalism" and that year it was Denise.
I do sometimes wonder if, as the show goes on, the judges realise a genuinely good contestant is (for whatever reason) not popular, so in order to keep them up the leader board and out of danger, they overmark them. I think they started to do that with Zoe, who ISTR was in the bottom two quite undeservedly once or twice. The voting audience did not take to her - I wasn't mad about her constant moaning and weeping myself - but she was a genuinely talented dancer and the show would have been poorer without her.
I want the most entertaining couples to continue - sometimes they are not the best dancers, and that probably annoys posters on here who are more attuned to the minutiae, are maybe themselves dancers. But most of those watching are just enjoying it as entertainment, okay a celeb may miss a step or two, but their overall performance was great to watch.
I think Bonnie was lambasted for the same reason Emma was - she was thought to be 'cheating', because she was already seen as a dancer, and also committed the sin of taking it too seriously. I was pleased Gaynor won though.