Bear in mind that CtB difficulties are meant to be fun to play, not a random experimentation with the editor. Make sure your map is fun, even if it's difficult! This comes only with practice. This includes making sure you don't spam 20 hyperdashes in a row - that's not fun, that's exhausting and frustrating.
Isn't that common sense? Please
Not necessary at all imo. Modders can point that out without the need of having a guideline for that. Nuking old rules ftw!