For example, I don't see how the abandoning of the papal tiara is an abandoning of the faith. Christ did not crown St. Peter with that tiara. It is not a part of revelation. It was a sign of power and empire when there really was a Christian empire, a sign that Christ was the King of Kings above all the kings of Europe. That time is gone though. It's an anachronism, not a part of the eternal faith that will endure forever.
The successors of St. Peter will always be Christ's representative (vicar), but Christ does not always need to be represented as a monarch to attract admiration, respect, love. It made sense for Christ to be represented that way when kings ruled over the nations.