It is true that Pete played more live gigs than Ringo. Is this meaningful? I don't know. Depends on what is meaningful to you.
Paul and Ringo do not owe Pete anything. Nor does Pete owe Paul and Ringo anything. If Paul and/or Ringo wanted to reunite that would be solely their choice, and not dependent on any other party wanting to reunite. It seems from the interviews that I have seen Pete is at peace with his past. It took him a long time and I think that is understandable. Pete has no doubt settled in his mind and heart he will never see Paul or Ringo again. Pete has moved on.
We don't know what goes on behind the scenes. We don't know if Paul and Pete, or Ringo and Pete have spoken in the last 50 years. To automatically presume one way or the other is naive. They would only release this information if all parties agreed to. Although, my opinion is that they probably have not.
Pete was duly compensated for the recordings that he made with The Beatles that have been commercially released. I don't know if he continues to receive royalties, and you probably don't know either.
I think it would be cool to see Pete and Paul sit down and talk on an interview show. As to who would interview them, I don't have any ideas, it would have to be a high caliber name to do so though. As to playing music together, I don't think there really would be much point to that. As to having Voormann, Sheridan, or anybody else, I think again, it would be pointless. They have all moved in different directions. Paul and Ringo barely have a point in playing together anymore.
When you are a musician, and there are a few members here that are, you typically want to always be moving forward with your music. So playing in a "fantasy" band is really not that much fun, and would be more of an exercise in voyeurism. It is would be similar in having Dhani Harrison and Julian Lennon and Paul and Ringo play together. You are begging for something that you can not have.
So, to sum up, again. Paul and Ringo owe Pete nothing. If any reunion would be cool would be just to see them sit down and talk and the obligatory hug.