Also, I see NV as Blizz's insidious way of 'encouraging' long-form farming (don't log out, you'll lose NV!) Since it can take me 10-15 minutes to find 5 rare packs, that 1hr sesh turns into 45min so I'm really only getting 75% efficiency.
I'd be happy for NV to be moved to permanently applied buffs. This game is already compulsive enough, we don't need any more reasons to keep playing and playing and playing.
I would also be happy with the ridiculous NV penalty being removed from skill changes. It's just another artificial way to keep us playing.