I would have put more focus on the random events.
I think it would be pretty cool if events in inferno where more common and a bit harder than the rest of the act.
They should feature unique mechanics (like the timed dungeon) which require you to rethink your strategy and spice the game up a bit.
In order to make them worth something, you should gain +1 NV after finishing an event and finishing one with NV 5 should give you 2 garantied rares.
I would also put a specific boss in every (random apearing) side area in inferno which is harder than normal boss packs but also garanties 2 rares (NV 5).
Theses bosses can also side area specific items.
This would be 1 BS plan and 1/2/3 items you need (in order with lots of gold and crafting materials) to craft that item. That item has can be used once inside that area to summon some really ahrd boss which would drop really good.