I can tell you a few things. These are my honest opinion, so you don't have to go too hardcore about it..
1) Bias towards player we know are good. - A lot of players get put on the PR, because we know that they are good, regardless of whether or not they enter our tournaments consistently. (A good example is Kismet2, who is relatively fine, because he beats everyone when he does come. A lesser example is Scatt/Alby, who will miss tournaments every now and again).
2) Not everyone who's skillful, is on their deserved PR placing - We all know who I'm talking about. However the problem here, is that if anyone beats him, it gives no merit. A good example is Micaelis, everyone has Rayku as a skill wall (Turtl, Alby, Scatz, and Dyno to name a few) and none of them can truly get punished for it, because Rayku isn't on the list. Micaelis is the only person to beat Rayku, not once, but twice, during the previous season. However since Rayku refuses to be on the PR, it's as if this match means nothing as well. While Mic's losses against Alby, Turtl, and Scatz affect him greatly.
3) Being able to prove yourself - To only go on tourney results, and any MMs you want. Players who lose $1 MMs, won't want them counted. People won't do random MMs (like, actual random character MMs) or anything theme based because the person can turn around and say that it should count for the PR. Is that really fair? The way it is now, is that someone is there to tell you "this will count for the PR, straight up", and if no one's there to tell you that, it's obvious that the MM is for fun, no more no less. It makes things more concrete.
But I mean really, I don't see why everyone's coming in here with random discussion. I mean no offense to the people talking to me, but...
Rayku
You're not even going to enter the PR for your own reasons, what does this stuff matter to you? Because you're a Panelist? If it bothers you, All you have to do is watch people's matches for a moment to make sure there's no horseplay. Sorry that you're having to do work as a Panelist >_>. You can appoint someone to watch the match you know.
Player-1
Don't you play pretty consistently in comparison to everyone else in GA? What are you worried about? Keep playing consistent, and you won't need MMs and PRMs to base your ranking. If you get challenged, just play them, that's not that hard either.
GTR
I haven't even seen you at all at tournaments. Are you actually going to participate in getting into the PR? Where were you at the USGA tourney if that's the case?
DA K.I.D
You've already said this, you're OoS. But on top of that, you're pretty high in your PR, you're well respected, you don't have problems beating the people under you, no matter when you meet them in bracket. What about people who have problems playing you early?
None of these things affect the actual tournament. You come in, you pay ,you play, you get a placing, if you're comfortable with your placing, keep it. If someone wants to MM you, it's all the same as a regular MM, there are a bit more rules, sure. But you play the MM the same way.
All in all, if you play correctly, you will get the ranking you deserve. These MMs and PRMs just give more competitive matches for people to play alongside the usual double elimination bracket.