Yeah, I find it kind of mind-boggling when people complain about Act 2 nowadays. Their head would have exploded if they hit Act 2 back before the patch.
First time we got there it was with a full party, monk and barbarian went down in 1 hit each, mage and witch doctor dodged bugs and fireballs for a couple seconds before getting 1-hit as well.
I wasn't lucky enough to see Act 2 pre-patch, but it was pretty rough coming in with gear that was barely good enough to clear A1. Now I feel pretty good about clearing A2 with my monk (certain affixes are still a bitch), but now A3 is absolutely insane. Anything with an affix that deals a decent amount of damage rapes me, pretty much. So A2 to A3 is still pretty damn significant for some of us.
Saying that, though...it's much more tolerable in a group. In a group we can zerg the tough enemies enough to kill them most of the time. I was able to down Diablo today with a group of 4 of us, but we corpse-hopped past 2 entire zones due to some crazy affix elites.