Patch 6.1 has leaked and some changes are surprising. But only positively.
Patch notes were available for Public Test Realm and there are some graphical options added like various Anti-Aliasing methods including Nvidia's HBAO. But the possibility to tweet directly from the game together with sending screenshots were not expected. Let's hope that Twitter will survive this WoW's tweeting calamity :-).
You can find the complete patch notes at the link below.