Full patch notes here. Unofficial changes listed here.
It's a very light patch which is healthy, the game is almost done.
For the Witch Doctor Haunt got reduced duration which is a very nice buff (it does its damage quicker), Locust Swarm got higher damage and Sacrifice got higher damage. Generally a good patch for us. Haunt - Resentful Spirit is now really useful doing 287% weapon damage over 2 seconds (then presumably jumping to another target if it kills).
Dots are rather redundant in Beta but will be useful for the harder difficulties.