This is it: the patch that brings all the new systems for Warlords of Draenor. The bulleted list below is compliments of Wowhead.
Pinnacle is resuming our recruitment efforts with the latest patch. If you're reading this and looking for a home after the stagnant months of patch 5.4, feel free to contact us in-game.
Also keep in mind that there is Content Not Coming in the October Prepatch.
Blizzard was kind enough to put together a 6.0.2 Survival Guide.
On the class changes front, the folks over at Icy Veins put together detailed guides for each spec.
And let us not forget, addons will have to be updated for the new patch version.