Why don't you just say what you really want: you want a church where the tail wags the dog. You want a church where the bishops take straw polls about teaching and change teachings that are unpopular.  You want a democratic and lay run Church. You want a Church where the bishops function more like representatives and less like bishops--representatives who are elected by the people and represent the people and do what the people want.  

If that is what you want, you can have that in the Protestant church.  We don't have to make the Catholic Church Protestant in order for you to have that.