I thought their AT was really good (just watched it on iplayer), but I also thought it was a bit robotic in places and never really slowed down enough for much in the way of sensuality/passion/chemistry/whatever to come across. However, that's more to do with the routine/choreography than how Kara danced it.
The 9s versus 10s thing is a difficult one, but I think the judges should be allowed to have some discretion there; without it, scores of 37, 38, and 39 would be impossible. And the difference in scores between Kara and Scott tonight was down to Len giving Kara a 9 and Scott a 10 and nothing more.
From the way some people are going on about it (and I know that it's about the leaderboard too), you'd think it was much bigger.
I'm not sure how I would rank Kara and Scott at the moment. Both dances were great, but I don't think either of them were perfect. I'm tempted to give it to Kara because I didn't like Scott & Natalie's use of props/separation, but I think Scott performed/acted much better.