Correct usage of superior/subscript features

I see. So this seems harmless.

What do you think?

That exception is there because it’s good to substitute characters in this situation or would it be better to have superior and inferior characters as well as .subs and .sups? What about ordfeminine and ordmasculine mentioned in another topic, they are normally entered from the keyboard but i also want the .ordn feature – is adding something like ordfeminine.ordn an overkill?