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What I find interesting about this patch is that Blizzard is testing to see how player's respond to being removed from the traditional dungeon crawl and instead being instantly matched up with the bosses that drop the phat lootz. 1 fight, 1 strategy, 1 objective, then loot.
If this is a success, it will vastly change how the most popular mmorpg in the world operates it's PVE element. My guess, is that Blizzard believes it will be a success. It will be a success, and a lot of guilds will rejoice about how great the new system is. People will gear up quickly, just like they did during the release of wotlk.
Blizzard will look at their success and then expand upon it, usually from the cries of players complaining that things are too casual. Then Blizzard will launch the PVE bosses that they have thought up for sometime now. The ridiculously hard, harder then what anybody has ever faced bosses. The bosses where everybody needs to do everything correctly at all times, and then have luck. People will complain. People will cry that Blizzard has broken the system. But guilds will be dedicated. And only having to focus on that one challenge, that one boss, instead of clearing and re-clearing trash, and crawling through a dungeon like old times, guilds will relish in the opportunity to finally down that boss.