Do you take suggestions? I hope so, since this is a discussion now.

Personally, I'd like to see:
-The ability to make custom merchants. I know it could mess with the 'vanilla-friendly' aspect, but maybe if it was an addon mod?
-Custom scripting. I'm tired of having all my guards wanting to know if I've killed anything big lately, and think it'd be a wonderful feature.
If anyone else has ideas, maybe add them as comments?