Ok, I haven't posted a suggestion yet, so I guess I'll throw one out there and see if it flies. I usually generate multiple ideas for MUDS that I used to play, but those have pretty much died, though there are some still kicking.
I enjoy EfU because of the challenge. The feeling of survival and struggle, toss in some politcal battles, factions, and other drama and EfU can run off the weak. So, I figured why not throw in something else, and I'm pretty sure it has probably been mentioned in the past. Starvation. There are so many elements in EfU that can cause drama, conflict, uproars, revolts, and others, that I think if food was just as important (or more) as gold, armor, weapons, etc, then there would be new things that would unfold. If PCs actually had a limited time before they would actually starve to death (perma-death?), then I think it would actually create something new for PCs to do. Forage for food, trade, buy, sell, confiscate.
Imaging cutting off food supplies from Lower or other minor areas. Like, a hunger timer would countdown in intervals day by day for the PC going without food. Go without eating after a day and you will reach the hunger stage, day two it gets worse, day three and you start to lose -1 from your str, etc, etc. I think this would add not just a new way of struggling and surviving in this dreaded city/Underdark, but also new strategic moves for political powers and other situations.
New jobs would open up. Rangers will be extreme hunters that could bring in food supplies. EfU is about survival. Food is the main key to surviving. EfU is about realism, not powergaming.
Anyways, just wanted to see if this idea is ok or just too extreme. If I've missed something or inaccurate on something that I mentioned, just let me know.
-Dreh-