Begs the question: how many parts do you have to add to an old car until it becomes a new car? If they completely change the sidepods to accommodate the proposed exhaust layout, is it still the F10?
I'm not at all aware of the specifics of the regulations in this area, but you would imagine that the powers-that-be would have thought of this loophole. If not- and if there is actually any benefit to gained from doing this - I think it's just as clever an interpretation of these rules as, say, interpreting the current rules to still allow you to blow exhaust fumes over the diffuser (as both are against the spirit of what was trying to be achieved).