Some observations and suggestions from a stranger on the internet:
IMHO ditch the fisheye and do some more shooting. The fisheye effect doesn't make up for boring cinematography. Shoot with the normal lens, and get creative. Interestingly framed shots are worth so much more than shaky follow cam footage.
When you're not doing follow cam, and just handheld static (oxymoron?) shots, let the skier leave the frame after he lands. This will help you out when editing because it doesn't look that great when you cut with him still in frame. After the trick is landed, there's nothing more to see, so stop panning and let the skier leave the frame, or better yet dont pan at all. Also tripods work wonders, though they can be a bitch to lug around the hill. Your stuff is pretty good, but you've got potential to do much better.