I only tanked M Mannoroth on last farm and sat out the rest tweaking my DK WeakAuras since I just couldn't bear to play this spec any more than I had to in it's current state. Hopefully the artifact traits change game play to a more interesting direction.
Mitigation-wise it was boring as fuck, I only once dropped dangerously low, eating all 3 hits from Empowered Glaive-Combo while suffering from Gripping Shadows so my health actually dipped from hugging the wall during stun and not the combo itself. The only "tank-play" I considered having done was taunting the boss at the right time and making sure I hit an extra ISB for the AM buff just before a combo. Making sure I didn't cap charges was far from interesting and I think I saw red stagger rise high enough to be a problem a total of three times (so 3 purifies).
Not having CE or at least even Dizzying Haze for ranged pulling on trash is beyond retarded as well. I guess we had that coming though.
TL;DR; Theme and animations improved, so guess we got our
#classfantasy fixed, but the game play sure does feel boring at best, at least for now.