"To counter that I offered an example of a change that might be a legitimate development."

No, you offered an example of a development and called it a change.  Your saying they are the same doesn't make it so.  "Development" of faith connotes an accretion to what has preceded, leaving what has preceded essentially the same.  With change, on the other hand, one thing is turned into another. A change involves a contradiction of what has preceded. If the Church were to say that the state does not have a right to use the death penalty, that would be change.  The Church has not said that.