The Church has the authority to reform rites and practices. For example any reforms of the Missal cannot change the fact that the Mass is a sacrifice.
I don't understand what you mean about the condemnations of Protestantism being hollow or the superiority of Constantinople. If you are going to make such bald assertions you should explain what you  mean by them.
The only prayer to St Michael I know of was never a part of the Mass, it was said after the Mass was over.
The Missal of St Pius V is still in use.