Yes I agree, something about this new format doesn't work.
I don't mind that there are more string players, because I always thought that some of the categories like percussion had a lot fewer entries and it seemed a bit unfair that so many good string players were out of it early on. But this isn't quite working for me either.
We only see such tiny snippets of their performances. And they definitely need judges experiences in the category and technique at the early stages - the wow factor stuff was always for the semi-final or final stage where you knew already that they were technically great and were just being judged on the musicianship and performance skills by then. It's too early to have them judged mainly on that.
I liked when you could see more of the performance, or at least catch up on iPlayer. This seems both more hidden away now that it's only on BBC4, and at the same time, a bit classic-FM in style with just the odd movements or short pieces shown.
Choosing two winners from the random division into groups of 6, plus extras, seems unfair as well, as already it says who the judges like the most, and then they are the same judges in the final.
But as always, the performers are amazing, and so talented at such a young age, and so professional-seeming already!