I admire their courage, overall it looks very impressive on stage.
I feel they are a bit nervous, especially the boys. And when showing the evening dress, they probably should appear more like gentlemen, holding hands with the girls rather walking side by side without smile.
Just my 2 cents, I am sure they will do better and better in future!
I also think traditional chinese dress will never go out of date, and most of all people would love to see it no matter what age they are.