One explanation on Mr.X racking up kills is that I play on the server.

But seriously I think he is getting a lot of kills on inferior pilots like myself. Others on comm's have also stated that he is quite good and picks his fights very well. Until proven otherwise I'll assume he is quite skilled.
Back on topic: The ATAG guys have made it apparent they are as split on what to do as the rest of us and thats why they are asking for feedback. I don't know myself but I know the Mk2 won't magicly make me an ace in the air. I was shot down in it when it was available. Hey, stop laughing!
In all seriousness I don't like the idea of withholding the plane entirely. I think it should be left up to the honor system. I know this isn't really a fix when talking about playing on the internet because we all know there are those who simply want to grief. But there are fixes available to bad behavior that could be brought on by that situation.
If I had to take a guess Blue is scoring more kills than Red without the Mk2 and also has more (skilled)players. When the Mk2 is added the teams seem to even up a bit.
I'll play on the server with or without as long as I am having fun. But withholding a plane has to be taken seriously because one day Blue might get a plane that outclasses any Red and where will all the "Mk2 has to go!" folks be when its their plane that is being withheld? Just a thought to chew on.
Have fun and take flight!