The changes are nice, I'm enjoying my time as DK currently.
Blood Tank (main occupation)
It's so much fun, I'm really enjoying it. After the Rune Strike Change and the Bonus on IBPr it will be even better. If there'd just be a way to make diseases more comfortable once Outbreak is on CD, I'd be totally happy with what I got.
Unholy DpS (just as substitute)
I feel so broken getting about 60% more DpS in 10 mans than in 3.x this just can't be right. There are far too much runes available and I even sometimes cap my RP. Otherwise it's fun, the way to play is really easygoing and allows me to see a lot more of what's going on around me and to yell at people while doing so.