Well, I'm a founder and hate the changes to Port Royal and Tortuga. As a higher level it's pretty rare for me to visit those two islands but when I need to go there for something I want to get in and get out.
The old islands were conducive to that, the new ones aren't.
My complaint with POTC all along is that they don't add real content often enough. Good quests are what keep the experienced players in the game. I used to have a full friends list with people that played several days a week. Every last one of them dropped out months ago because there was nothing to do.
Heck, for months we waited for them to unlock the bug-ridden Black Pearl quest and no one on my friends list took more then two attempts to complete it. Huge letdown.
While they make changes how about a good quest with some real meat to it to keep us upper level folks interested? None of these piddling "go out and sink ten ships, now collect 20 buttons from a soldier, now kill five crab" type missions.