For those unaware, you are NOT supposed to lose Hit or Expertise in Challenge modes.
Pretty what much the title says.
If you check my armory, you'll see I'm at 464 equipped item level.
Outside of a challenge mode, I have 3647 spirit. Inside, I have 3641.
As far as I can tell, that's because I'm being scaled down to 463 ilvl...except scaling down spirit means scaling down hit for Shadow Priests, Elemental Shamans, and Boomkins. This is especially problematic since humans get 3% extra spirit, making it definitely better than hit for us.
Please fix this. Don't scale down spirit if the character is Shadow, Elemental, or Balance. While it's not a big deal now, future patches with much higher ilvl gear definitely means those three specs will *require* a second set of gear for Challenge Modes. Which, while probably a good idea in general, definitely isn't intended to be mandatory.