Seems like the DJournal for raid bosses is getting a TL: DR version added in WoD (atm only Garrosh in SoO has anything).
You can see in the 1st screen that the normal tab for boss abilities is replaced with a basic fight overview. The original content has been given a new tab (fireball below loot tab)
A few other UI changes I've noticed:
Mount frame finally getting the pet journal features
In-game addon manager
Tabbed keybindings menu