There is a pretty significant pathing problem. Outland's hilly terrain is giving mobs a lot of difficulty:
On that topic, one of the Bleeding Hollow Grunts I fought on a steep hill decided to clip inside of the hill and evade back to full, but he decided to clip back out a couple seconds later. I also teleport around a bit when I'm Feared or use WotF to break Fear. I haven't fallen through the world while Feared, though.
Collapsing Voidwalkers always deal their Collapse damage ~1200-1300 upon death, even if they're stunned or are killed before the cast finishes. I forget if this is a bug or not. Leaning toward it not being a bug.
Found two quest bugs so far: Bleeding Hollow Blood that you need to loot for Boiling Blood doesn't seem to drop if you have one in your inventory. This means you need to kill 1-4 mobs to get a Blood, boil it at the cauldron, then repeat, rather than just farming 12 Bloods and boil them all.
Secondly, I was able to loot a quest item I'd already hit my quota for: http://i.imgur.com/rGqF5b9.jpg
http://i.imgur.com/9TnOG4I.jpg This guy wasn't attacking or attackable, or even selectable.
http://i.imgur.com/08Sxw95.jpg Crust Buster names shouldn't be visible until they're in combat with a player.
http://i.imgur.com/DyprwFo.jpg Stealth counts as Shapeshift when trying to mount (it should destealth you and then mount you)
http://i.imgur.com/WwiJY5T.jpg The icon says he's a repair dude, but he only talks to me.
http://i.imgur.com/qDLyXUV.jpg "You need to be in %s."
http://i.imgur.com/eWQ4qTG.jpg Unique (65535)
http://i.imgur.com/FMZyYyH.jpg These Honour Hold guards don't seem to care about Horde very much.
http://i.imgur.com/xg5yh3K.jpg These are attackable and killable.
We should not be able to see enemy health values without an addon like MobInfo2 and attacking them first (just like in Vanilla). We didn't see exact enemy HP values by clicking on them until 3.0. Also, this cow definitely didn't have 1500 HP (believe me, I "tested" this): http://i.imgur.com/UwCxQlY.jpg
Last one: the Fel Reaver didn't feel like patrolling the zone. He just stood by the buzzards and skeletons north of Honour Hold. Pulling him and resetting him did nothing.