[Infares]

I like the ideas also, but keep in mind gray items are there to balance monster encounters, monsters do more damage when they have white/yellow items as the baseline (I've tested this with mods) and if they're using only greens and uniques you die. A lot.

Number 6 would have to be an option available in the interface options, as not everyone would like this just as not everyone likes the way it is now.

Changing how spells are cast from hotkey has been needed in the past but was never even approached by the dev team, IMO that was a mistake.

Closest thing to a "Secret Duck Level" is the Overlord's Passage, and I think the game has quite enough easter eggs in it now.