It's a bit of a slog. Will proabably go faster with gear, but now it takes me about 40-50 mins to do a layer. I suppose we're not supposed to do all 4 layers on reset day, because i did that and I was so sick and tired of it by the end (did the new 4-6 and the other 6 layer).
Otherwise the concept is OK, just don't get why blizz feels the need to nerf abilities and buff bosses, can we not just have something fun and OP once in a while? That's the whole point, you sometimes get lucky and oneshot stuff and make odd amazing builds. Not slogging through it with small buffs.
Also note I feel like I am one of the lucky ones - I play a prot paladin so most of my abilities in there are cool.