I would be so, so happy to see them leave. I am sick of all the stunts trolls pull in private groups.
I know that FDev will never make anything open only. BUT they should consider it, because many, MANY of the issues this game has can be tracked back to the idiotic decision to try and make an MMO game that let's you completely ignore the 'MMO' part. As I've said before they should have chosen at the start. But its too late now.
What you seem to fail understanding is that that decision is what made the game possible. Without that decision you would not have a game to complain about.
David Braben, from the start, said it was not the typical MMO and that there was no "right" way to play it.
There is no ignoring the MMO part of the game, everyone regardless of mode, region, internet speed, time zone, instance etc affect everyone else who plays the game.
Anything someone else does you have the power and tools to counter regardless of your mode or what mode they are in.
While you may not care about power players leaving power play many do, thats why they are trying to force people to play it in "the one true mode" many of them only want more soft targets. The complaint (maybe belief) that they cant counter someone doing something in another mode is simply not true. While it may be true that they cant counter them by shooting them they still have the ability to counter.
I personaly have no issue with making PP Open Only, I do however feel it could bring the end to PP. I doubt it would have the effect some people are thinking it will.