Inferno mode is broken, it's impossible to solo it as a Demon Hunter now because they swung the nerf bat which effected the casual player who wasn't playing the game 12 hours a day and clearing it, and elite/champion mobs are just so horribly overtuned at times that you need to stack the living crap out of Resist All in order to not die in one shot. The sad thing is that Inferno is faceroll in a group, so they pretty much force us to play in groups in order to complete the entire game. For solo mode it's nearly impossible for every class.
A game, for want of a better term, genre that in recent years has been largely single player got a multiplayer mode wedged into an entry into said genre by somewhat questionable/radical means. The developers of said game then included an option that by virtue of the game mechanics themselves almost compel the use of the potentially deal breaking feature, but at the same time not setting the entry barrier to game high enough as to be financially ruinous to the game which depends on having both considerable sales and a large active userbase..... seems like Blizzard are doing their job to me.