Well you have every GC on ignore so it doesn't matter right?
No, don't introduce some bull**** events system related to UN. You would get even more annoyed....
My suggestions:
Redone Supernicks to replicate a functioning spar similar to Exodus spar. Why do this? Because Supernick's isn't serving a purpose rather than be a landmark. It's in a more centralized location. I've explained in the other thread anyways.
A few more quests. They don't have to be as thorough as sardons or gnome quest but some nice quests for a cool NPC
Converting the old overworld wouldn't be as productive as just producing innovative/remade content in my opinion.