Secondly a question (sorry if this was discussed somewhere else, I couldn't find it), how do champion monster affixes work with the new difficulty system? For example, currently, Normal -> 1 affix, ... Inferno-> 4 affixes. Anyone know?
Although I've not researched this part (no low level chars) it's safe to say affixes are not tied to the difficulty. Difficulties have nothing to do with what they are in vanilla. They have complete different bonuses, which you can view here. More affixes (up to 4 still) likely show up at certain character levels. Saw a level 30 Crusader in Act III and monsters still had 2 affixes.