I don't disagree re: the voice Gav, but her connection with the audience is very weak, and regardless of strong performances or not she isn't building support at all. Whats more the bullying/nasty tag has stuck (unfairly) and it will be impossible to remove now. At the current rate they face a huge battle to get her to the final(which they clearly want.) It looks like Cher 2.0 to me and they'll be delighted if they can squeeze her into finals night.
Marcus' styling was v risky tonight, and he's lost a bit of momentum. The Bruno Mars idea is a good one to pursue, but they then went on to style him as a 50s tribute performer again, for which there's no market. He continues to get no favours from the show, I can't see him getting any in future, and he's treading water imo.
I've traded out of the 19s bet on him at 3/1. Should still make top 3 to land the bets on that.
Louis' comments tonight suggest Janet has been topping the votes in the last few weeks, but another poor week for her.
For me Misha isn't contending, but I agree with your other 3 as being the only remaining realistic winners(with Marcus likely to have the carpet pulled from underneath him at some point.) The show will continue to push Little Mix, but given the Amelia factor they'll need to remove her soon to give LM any sort of chance.