Wading into the fray with my contribution (I may live to regret this!)
I was a BIG Matt fan last year. I supported him (quietly) all the way through the series (I have, over the last few years, since Ramps, taken to not revealing my favourite as I don't want to jinx them! Whether it's worked or not is open to debate!

) I also loved Kara and Artem (so I was kinda in a win win situation).
Therefore, speaking as a fan of Matt (and Aliona), I have to say I agree with those who are saying that Aliona made a grave mistake in what she said (head dropped in hands when the words came out of her mouth on ITT. I KNEW it would come back to bite her and she was a fool for saying it. Also - since when has a bit of advice from someone who might know what they're talking about gone amiss?).
I support Len in what he said tonight. He didn't berate the celebrity. He berated the professional - and yes, he was disapproving in his context but saying he wasn't going to give her advice because she had stated that she didn't listen (which is more or less what she said - of course, everyone has their own different interpretation of her words, but that was mine) and speaking to Harry instead made his point without him having to be as insulting about her as she was about the judges.
As I say, I LOVED Matt and Aliona last year - right from the very start - but I started to despair of some of the choreography when Aliona INSISTED on putting in tricks to show off her partner's gymnastics. We KNEW Matt was good at gymnastics - if we hadn't before we knew it from the first week of the trick. There was absolutely no need to include it after that first time because the man could bloody DANCE as well! Why not showcase the dancing when the show is, after all 'Strictly Come DANCING (the clue's in the name).
Honestly? I wanted to tear my hair out sometimes last year with Aliona - and I LIKE her!!!!
I get the impression that if she doesn't start listening and doing what has been advised, then Harry's bad habits will continue (when they could so easily be ironed out because he's eager to learn and he has the talent) and will ruin his chances. Because the judges (and the public for that matter, many of whom are as critical, if not more so than the judges and many of whom now know what to look for in each dance - footwork, posture, etc etc) will get sick of the same mistakes and Harry will end up leaving way before he should.
Anyway, that's my twopennethworth .... now going back to lurk ...