I agree that it "kills the main point of an MMO". By definition, an MMO isn't supposed to behave like CoD where you click the server/instance you want and get teleported into it with 17 other strangers.
An MMO is a massively social platform, and making everything instanced and making a dungeon-finder will basically negate the classic sense of a virtual world which people play MMOs for.
Ease of access isn't a win win. Because there are huge negatives that come with this.
