I'm not sure why the safe area would need to be "very limited." I mean, if it gets worked out in such a way that it doesn't encroach on the pvp area's ability to have fun... what's it to anyone the size of the area? If you're having fun, what's the problem with other people having fun if a way can be found to do it so that you get to have fun and they get to have fun?
I could certainly understand why people who have a real passion for pvp wouldn't want to stick around if the pvp isn't viable. Many are saying just that.
If a way can be found to make it fun for all, it's worth a shot. If people are willing to keep batting ideas around, it's worth a shot.
We put humans on the moon, and have cool remote control toys cruising around Mars... someone thought it was worth a shot even if it wasn't easy.
If you're worried about there being no players in the safe areas because there are no players who want to play that and the unsafe areas being cramped because everyone in the world wants that, make it a dynamic system based on monthly population of said areas.