Yes, but I am not sure I understand your point. Do you think people should not be excommunicated for acting as stubborn as a donkey with a nail in his head?
10 As for a man who is factious, after admonishing him once or twice, have nothing more to do with him,
factious = αἱρετικὸν (heretical)
This is really more “shunning” than excommunicating, but the point is we are not to pretend like factious and persons embracing heresies are in unity when they are not.
I don’t know if “more”, but it does make clear that the Petrine gifts are not dependent upon Peter’s impeccability. Peter had a specific and unique job, and to do it, he needed to fully understand his own weaknesses. They all said they would go to Jerusalem and die with Him, but when it came down to it, they could not.
Romans 14:4 New Revised Standard Version Catholic Edition (NRSVCE)
4 Who are you to pass judgment on servants of another? It is before their own lord that they stand or fall. **
And they will be upheld, for the Lord is able to make them stand.**
God upheld Peter, as He does all the successors of Peter. If not to eternal reward, then at least to preserve His One Holy Bride.
Yes, of course, and there are many ministries and delegations. All of them need to get included in the prayer for Peter, though. Unity with Peter is key.