It's ok, let the people who ground out that grindfest of a questline have a special boss of their very own (They will hug it and kiss it and call it "George" :P ), the main bulk of the content is still accessible to everybody, so what's the big problem with limiting access to this one boss?
Oondasta proved that a difficuly boss that can be accessed by everybody doesn't work in WoW (Nerfs hit Oondasta harder than players ever did), so now they're trying a hard boss that has a form of attunement, i'll go shed a manly tear over what i'm missing out on, and then i'll take my scrub self over to SoO-LfR to kick some ass :P