That said, they will also need to be accessible to non-guild PUGs, as there's no shortage of small or diminished guilds in the game. If elements of the precursor hunts are going to be integrated into the raids, which is what I'm getting from their legendary rewards line, then everyone needs a shot.
And difficult content is all well and good, but we can't fall back into the hellhole of gear-pinging that was ever-present for Urgoz/Kanaxai, etc. in GW. Elitism and disgracing have no place in this game, and reinforcing the metagame makes it more fun for no one.
You realise that challenge and "elitism" comes hand in hand. In a somewhat gear and build depended game you can't just walk into challenging content with any gear/build and expect to complete it. If you could, it wouldn't be challenging anymore once you optimise your gear/build.
Aside from that, elitism even comes without challenge. Dungeons *cough*