Off the top of my head:
Nagasu (post nationals 2008-2010)
I agree that she was a non-threat, before. She improved more than just her errors. It was like she was an entirely different skater, with much more audience connection and competitive fire. Some people even went so far as to compare her Samson and Delilah to Kwan! I was definitely not an Ashley fan before she went to John Nicks, but am now.
Originally Posted by koatcue
Wicked Yankee Girl
Anna Pogorilaya - last year was the first time she was skilled enough for Russia to give her a JGP event.
This year she makes the Grand Prix final and wins a Senior Grand Prix event!
Fernandez greatly improved.