A grued split from a grued movie?
Everything takes time to get good at, even TASing, a great way to stop a lot of people from keeping trying to get better at something is being so insulting. Sounds like your issue is more with the what is being allowed to be published, maybe better taking that up with the judges.
You can dive from the snow onto the icey platform without the bounce, it's faster try to avoid bouncing if you can.
Edit:
I'm just uploading one I made. Though there'll be better ones.
Link to video
I did one level decently so you could try and beat that.[/shameless self promotion]
Sonicpacker did a bit, Plush did a few plus there's the 20 star run.
Of course coming up with optimal routes when that hasn't been done before would still be useful for a full run.
GIMP works well, I use that. Though there's no preview so you need to work out the gap between frames. You can just use it's crop tools. Though you need a video to JPEG converter.
Is a new 0 star run in the works? It's really sad that the newest one is over three years out of date. The only runs since then have just been done by a few people, and I don't think there's been as much work in the camera angles.
He still has to go through that door to load it, so the second Bowser key is needed. Unfortunately.
You should check out the moat skip if you want to see the best chance of a Bowser skip. However that currently needs the wing cap.
Off the top of my head BiTFS, BiTS, Whomp's Fortress, I think SSL has some in the pyrimid, HMC probably does. That's all that comes to mind, but I probably missed some.