Instancing basic dungeons is one thing, but I'd really hate to see raids instanced. If they implement this, but not have a system in place for adjusting/unlocking the difficulty of raid encounters, the content will surely be watered down to better accomodate the 'Pick-up-Group'-style (being more common, as well as casual) as opposed to a more competitive Close-Knit/Linkshell-oriented design.

Not saying I'm opposed to casual dollars pouring into the game one bit... but the end-game is one area where there needs to be content designed for multiple skill levels. It is important for content to be accessible in order to better communicate the story of the world to the players in general, but there must also be worthy, challenging, and enticing goals to work towards, especially in MMOs.