Case in point: Wrathion's fight. Sure, it was easy as hell for my buddy's 535 ilevel Heroic Frost DK, and he one-shot it like it was nothing, didn't even get a mirror image phase. For me at 517 in full LFR Ret gear, was a nightmare, almost hit two image phases, cheesed the first through class mechanics (Blinding Light to interrupt one cast, Hammer of Justice for a second, and got lucky on the third and hit the real one quick), and wiped about 50 times to complete it. And I am by no means a "bad" player, so do not even try that line. I just lack a schedule to dedicate to a guild (leaving for work at 9pm PST 5 days a week doesn't make you desirable).
This new Legendary method allows those with dedication and patience, regardless of their level of progression, to eventually earn it. How is it bad that other people get to have some fun and earn something cool too? Oh right... you miss being a "special snowflake"... Suck it up and deal with it. Sucks you had to pay for the whole YEAR of WoW to keep up on the quest line, and not just get your Legendary in 4.2 that carries you completely through 4.3, never needing an upgrade.
This model is easily the best model Blizzard has come up with: Time, dedication, effort, persistence, and PERSONAL skill (see: Solo scenarios). My only request: No more PvP quests for PvE content.