Imo. It depends on what you are judging by, most people are going to judge by who they warm to. If by dance and technical ability alone, then for me at the moment (remember, it can all change) the most accomplished in a single area is probably Ali, she has a grace and cleaness about her dancing, and did very well tonight, but she stumbles with her routines and can seem lost out on the dance floor.
The best all rounders are Natalie and Jade. Jade has shone in one or two dances, and has pulled off both Latin and Ballroom well. Natalie, whilst not as polished as some of the other ladies, and has not shone as technically as some of the others in a single area, has done technically respectable and enjoyable dances in both Latin and ballroom, and seems to be comfortable with both and gives an even performance in both areas – and is getting better week by week. If anything, I think if she can polish her routines, lines and her free arm just a tiny bit more, she will be the dark horse of the competition and not just the 'I like her enthusiasm' contestant.
Layla, seems to be a bit of a one trick pony, though I enjoyed her paso tonight.
So, the technically the best imo are...
Ballroom – Ali, with Layla a close second.
Latin – Jade
All rounders – Natalie and Jade.