Innovation? Hardly. You need to re-read that part again. Christ says "I will give you..." [that's future tense] and then He gives it to all two chapters later.
The reference to feeding the sheep has to do with +Peter's tripple betrayal, not about giving the keys.
I'd think Jesus would have used the instruction in John 10 to be more clear about men being given authority, if His intent was to give men total authority in the way men were claiming it centuries later.
The reference to feeding the sheep has to do with +Peter's tripple betrayal, not about giving the keys.
Yet, some of your Catholic brothers have used it in the way I described, where only Peter was specifically charged with the task of feeding the sheep.