Patch v1.05 is out as of today. They said they doubled legendary drop rates, but I found 3 in my last three or four hours, so I think it's a bit higher than that. Also found a key to a new quest/dungeon/boss battle.
Monster Level feature has been added, but you have to go into the options menu to enable the ability to use it (I seriously have no fucking idea why Blizzard does that kind of stuff, hiding features in a toggle in the options menu)
I am still playing the fuck out of this game; got 5 level 60s (one is a hardcore monk) and still haven't touched witch doctor yet
Monster Level 2 Act 1 inferno mobs were giving me a bit of trouble (budget-gear monk) so I'm interested in seeing what the MLvl 10s can dish out