I don't know how difficult (coding wise) this would be but, i was thinking that since haven is the center of most commerce and travel in Spiral Knights it would only make sense to add more ascetic appeal to it.
Adding a day/night cycle would increase the sense of realism within the game as well as adding possible opportunities to do special time based events. Seeing as, at the moment, haven is always sunny and everyone (NPC wise) is always awake. Don't people (NPCs included) need sleep now and again?
This is just a friendly suggestion for a static appearance in Haven. I know that the possibilities of this actually happening is low but at least give it some thought.
Sincerely,
GlitchedPixel
If they connect graphics changes to time of PC it would be great. :b