Tutorialisation is always one of those tricky things, especially when its about GameFeel things you really only get after some experience with the Mechanic or even just the genre. I’ve even had people not be able to do any air control in a Jump n’ Run which doesn’t automatically halt movement in the air. Something I felt was completely natural to be able to do due to my years of playing SMW. So goo luck with the tutorial overhaul.
And I’d be very interested to see what you can dig up on those old shaders.