Ran a few dungeons on ptr as a tank, DH is over tuned as fuck atm. I purposely pulled heavy 3-4 packs at a time and only died using BrM (tested BrM, Dk, war). I had a guild pocket healer during the tests.
DH was the least spikey, felt like I had a ton of tools and emergency heals when I was low, but soulbarrier and fiery brand being on gcd felt bad. Soulcleave works a lot like frenzied regn now.
The new blood DK abilities added yesterday feel good but still feels like it's lacking something. It could be also be me not being 100% capable with a bdk.
War was more of the same, IP feels more adequate then what it is on live but the rotation isn't amazing and feels like wack-a-mole. Charge is on the gcd and SW/LS. that has to change if they want warriors to be competitive.
On tanking dummies I did 5 stacks on BrM, 7 on warrior, 9 on DK, 13 on DH.
Obviously numbers are going to get tuned but DH has the most complete suite of tools atm.