Browsing through some of the changes in 4.2, I came across the encounter journal. After a good look at it, it really showed me the time of rushing headstrong into a fight, with plans to "work on the go" are a thing of the past. No longer does Blizzard want those to be uneducated of the current boss fight.
Though I really see no faults with the encounter journal, what if it was the exact opposite? What if there were no strategies, no how-to videos, and just about no information on bosses entirely? What if it was illegal to post such information, and the only way to acquire it was either word-of-mouth, or just fighting the boss and see what he does? Blizzard would remove testing new raids on the PTR, and hire employees to do 100% of the testing.
What do you think would happen, if Blizzard gave us no information whatsoever, on bosses, cut off all ways of obtaining information, and have the only way of learning an encounter, would be to simply do it? How would if affect the long time raiders, the newcomers, the hardcore players, the more casual players?
I personally think it would impact the game in a very positive way. Raiding would become a true challenge to all, and the idea of discussing boss strategies with your fellow players would definitely bring in a new sense of community.