I Don't know if you got my message on Twitter ,but there are 2 things me and Dangerless have found that a TAS could miss.
1 is Dangerless found a way to clip underground in a few areas with the balloons towards the end near the Boss Statues just by jumping on them and getting them lower and lower. He may have a video that can show this demonstration and we hope and wonder if there is a way to get to the boss without any of the crystals.
2 is I messed around a bit with the super jump in 2-2 Wonky Circus on the big red/white tent in the beginning near the first electric gate, but when I fell into the pits then recovered out of it, it placed me right next to where the 2nd crystal entity mini boss would be. Which is way off to the first part of the lower level in 2-2. I was hoping to find and OoB around there somewhere so we could skip the 2-2 arena, but this wrong placement could put us somewhere else like after the arena, but so far no luck.
I'll be trying to get a video of mine once i can replicate it. It could be just a stroke of luck, but it IS there.