Mutilate feels very slow and the damage seems not that great, sub seems better and I've not had a chance to test combat yet
combat readiness and cloak of shadows do not share a cd anymore
feint with elusiveness is pretty dumb (no cd on feint and it only costs 20 energy)
burst of speed is very good and it's a tough choice between that or step (comp dependent)
without the deadly brew pvp set bonus leeching and paralytic poison are pretty poor atm
I tried a mastery reforge as sub and was surprised, I dueled a ret paladin with 66.77% pvp resil and during dance I was hitting in the area of 25k-30k ambush crits (my stats 17978 ap, 24.23% power, 54.63% mastery) but the main burst was from evi crits,
this was during find weakness (dance), There were more crits that I didn't screenshot but most were either just below 40k or just above (On a side note my rupture was ticking for 1.9k and critting for around 4k). Outside of dance my damage seemed ok, mainly due to passive white/poison damage (helped my the 50% haste from SnD) my attack speed was 0.9 for both weapons. hemo and backstab don't seem to hit for very much, usually in the area of 6-9k non crits.
Overall damage feels lower, The main damage source seems to of shifted from backstabs and ambush and more towards evi crits.
I'll do some more testing tomorrow but if you haven't already I would recommend trying a mastery reforge for sub
Problem with what you said at the end, regarding the damage being swapped from our combo generators to Eviscerate is that there are so many things to keep up in MoP. You need SnD 24/7, Rupture as much as possible, and Recuperate situationally. Damage needs to be higher in the Rupture and BS/Hemo department.
Like Khuna (and I, previously) said, I won't be shedding any tears at this point. Blizzard will notice eventually and fix our damage accordingly. Sad thing is, we might have to go half a season with pretty underwhelming damage. Hopefully it's corrected sooner rather than later.
Everything else minus the damage tweaks seems pretty good in theory. I haven't put anything into practice yet however.