General
Normal and Heroic raid encounters in Mogu’shan Vaults, Heart of Fear, and Terrace of Endless Spring now award 40 Valor, up from 25. This will take effect after the weekly reset.
Mogu’shan Vaults
The Spirit Kings now activate in a fixed order. (Stipulation says it will be Qiang the merciless ---> Zian of the endless shadow ---> Subetai the swift ----> Meng the demented )
According to battle.net (For those who don't catch these hotfix notes) Spirit Kings will no longer spawn in a random order! Aswell, Raidbosses give increased Valor. ;D
source : Patch 5.1 Hotfixes - December 3 - World of Warcraft