This really isn't a valid argument to keep something in the tier. We can cross that bridge when we come to it.
Its really not. As far as im aware this has only been done to stop OU pokemon becoming ubers. What your doing here, while similar, is a whole new can of worms. Whether you agree or disagree with the whole no ubers thing/altering pokemon in OU, its easy enough to see why its being done. It doesnt really make any sense to do in lower tiers as those pokemon can still be used. (if that has actually been done in uu/nu big lol)