patch 2.0.10 notes on the PTR

[Lissa]

However, this certainly doesn't explain the threat nerf as fixing the itemization problems would tend to trade some threat for mitigation (currently gear has a lot more strength or AP than it needs and not nearly enough stamina or armor, for the most part) which would exacerbate the problem. :(

Let's face it, itemization is broken for all classes. When you can look at your Tier sets and see that, for the same item level, they suck compared to random epics and blues, there's something horribly, horribly wrong.