I have idea: super simple plugin who lets player to own region in the world. in owned region only he can build and remuve blocks. I want it very simple. I know you can do similar thing with Worldguard or RegionMarket. just simple plugin. now my way how to register players to own region. server admin can just go to region and add owner. simply just standing there. It might be stupid. If it is i try to find out how do it with WorldGuard. (i just dont like that plugin)
Why don't you like WorldGuard? It does everything you just mentioned and more. I've used it (and WorldEdit, of course) for some time now with no problems. That said, it seems there a several "protected region" plugins out there now. Some more basic than WorldGuard. Check the plugin list.