I personally don't mind this to much.
Dawnwow a WoWInsider commenter made a very good point though:
From a quality of life perspective, this is awful for hardcore players. To stay competitive we'll have to gear and level as many alts as possible. The top top guilds will do that so they can stack any class that is favorable at the time they're working on whatever boss, and the guilds who want to compete with them will have to follow along.
Vaneras -- Raid Releases