Not sure Peter would recognize this Church...he warned of the changes and additions he already saw to the traditions taught by them...long before the NT was ratified...
John the revelator wrote to 7 churches...most of which were already straying...
But yeah I understand what you intend...
There are no changes, but there is growth and development, as there is with any living thing, and the Church is a living thing. Just as you look nothing like your baby pictures, neither does the Church. And just like you are wiser and more knowledgeable now than when you were a child, so is the Church. Yet you are still you, the child you mother gave birth to, and so is the Church.