I don't know what they did this patch, but let me tell you: this game just rose to a new level for me. The fights are more interesting, there's more monsters, the areas are different/bigger. It's fantastic!
I just did a playthrough on my barbarian, and it was hilarious and I really felt an increased level of enjoyment when compared to patch 5. Not that patch 5 was bad, this is just better.
Lots of great UI improvements etc too, and the blacksmith got better I reckon.
I think they've got something pretty nice in store for us.
*Gonna try wizard now, see if that feels improved as well.
Edit: Didn't mean this as a show off of having beta... I was just really having fun and wanted to tell you guys that the game is getting better and better.