If someone asks me, "Hey Stieglitz, what changes have they made to warriors in the beta recently?", my only real choice is to wade through weeks of beta warrior changes on MmoC or wowhead and read through a bunch of tweets on wowhead's tweet tracker, which can take a while. If someone doesn't have a friend who is a major WoW geek, then they may just have no clue. It's not just a or world of Warcraft matter of letting current WoW players know what's happening, but letting past players looking to come back or potential new players know what's going on in WoD.
Having multiple outlets for all of this information is even worse. Even though I peruse MmoC, wowhead, and twitter, that doesn't mean that I want to do that. Blizz needs to have a curated page that combines all of these sources of information for the average WoW player to consume. And, no, just the beta patch notes do not fulfill this requirement.