Well, not really change but rather enlarge it. I would like to know if its possible to recieve quests through buildings so you can use these buildings and of course the cities they are in as quest givers.
On the map they of course need a nice dwarven city icon and when you click on that, a city shows up just the way our cities are, but of course with dwarven houses and mines this time. Then you say one of the houses, a mine and the main hall for example are clickable and can be recognized as quest givers through a big questionmark floating above. If you choose one of these buildings a quest window pops up. There could be 3 to 5 spots in every city and cities like these could be spread all over the map, filling some of the gaps there are from missing players. The quest could be a nice extra feature, so the dwarves won't disappear with the next race coming up and maybe help some newbies and older players to recieve something nice.
Of cousre not all players get the same. It should depend on the chapter you are in. Also they can only be done like once or twice a day, so you cannot overdo it and gain all your stuff through these side quests.
That would be my idea.