MuhVerisimilitude
Hero
RED: If no class is allowed to transcend from mundane to non-mundane then you can never have a character who becomes absurdly strong, because this character must at some point transcend from not being absurdly strong to being absurdly strong. The exception is, of course, if they start from absurdly strong and then grow to godlike strength as they level up.I'm fine with a purely mundane martial PC and accept that that is what people want even if they experience diminishing returns as the game progresses. I'm equally fine with a purely supernatural martial class out the gate who can match a caster across the board. My two big nos are classes that start "mundane" and arbitrarily become supernatural at high level, and the "this ability resembles magic, but it's mundane so it's not limited in the same ways magic is" answers. If you want mundane, be mundane. If you want supernatural, be supernatural. But don't be supernatural and call it mundane.
GREEN(?): This also seems quite impossible. Here you are saying that no no ability must resemble magic without having the limitations of magic, but that means that it needs to be magic, and this is absurd. If I say that Bob is so strong that he can lift an elephant, will you argue that is magical and must therefore be subject to the same limitations as magic? Can it be counterespelled? Does it stop working in an anti magic field?!