I think it would be nice to have all items drop able that exist.

Talking about dyes, key, ALL chests, all scrolls and all the other stuff.
This could be a really small chance maybe as likely as the highest end rune or even less, but I think this would give running and killing monsters some value, rather than being forced to wait for the gold or buy.

Maybe this could be coupled with players ingame not connecting with the same key, so it would encourage public games or runs, instead of solo mfing. Maybe even limit these useful drops for public games like that.
Bringing the dia / baal runs back, with higher participation and not counting spectating chars idk...

I know this is controversial and I'd accept thIe argument you want it for server donations and to keep the server running, or maybe keeping something for your work too which is also fair.
Just a suggestion