I think everyone should make up with everyone, because I think people are happier when the air is cleared. You never know when the end might come, and you never get to say what you might have wanted to say.
That said, however, it would really be Paul and Pete having a conversation. I can't see that Ringo had much to do with Pete, although they might have known each other a little from playing a few of the same venues.
From what I understand, John was closest to Pete and George was the one who championed getting Ringo in. So Paul was not the main mover in the replacement matter, or the main friend to become estranged. It might be nice just because Pete sounds like a nice guy.