Hmm...I think Shin is the best editor of the year, but I don't think he's the most improved. His stuff started out amazing and finished amazing, but the level is about the same. Everyone obviously improves with practice (I know I grew a lot this year in AMV making and got much better), but someone like GuntherAMVs that took a huge leap is more fitting for this type of award. I haven't had the chance to re-review a lot of editors works from this year yet, hopefully I can find a handful of editors to recommend for this.
Sorry but I do not think so, just to see the gulf that exists between, Extraball, and fate matrix, there is a huge improvement.