There is silence about the Assumption until about the 4th century (so Altaner is off by a century BTW). Lack of evidence means few statements for or against, so not much indication of change one way or the other. To measure change you need a good set of data points over a set timeline.
Good data points come from those doctrines that we actually find implied or discussed from the Apostolic Age on (papacy, Eucharist). And that is where your argument falls apart. Because there is no change.
You do realize you killed your argument for Sacred Traditon with this post.....right?
“Good data points come from those doctrines that we actually find implied or discussed from the Apostolic Age on (papacy, Eucharist). And that is where your argument falls apart. Because there is no change.”
No Apostle discussed the Papacy.
No Apostle discussed the Roman understanding of the elements of the Lord’s Supper.
Nothing before 100 ad that is an unbroken chain for half or more of what Rome teaches.
If you won’t listen to your own beloved pope, your issue isn’t evidence. It is pre-belief apart from evidence.
Good luck with that Claud.