The recent buff to karazhan is something I believe most of us really appreciate, and it's a very important step in making the server slightly more hardcore.
The question that I can't seem to find an answer to is the difficulty of normal and HC instances.
Are the hardest HC instances challenging for players with decent gear or is it more like a normal instance?
From what I remember from retail tbc the easy hcs were doable before kara and the difficult ones required more or less a tier higher gear.
Any thoughts from 70s that have cleared some content?

