Personally I would just like for 2 things to happen.
1) At least T2 access in the other citys, this would be nice and with the more then one style at housing doors being used, I can see this as possible now.
2) City specfic guild hall designs. I know this might be harder, but it would make for alot of RP'rs happy, not to mention the creative ideas for such places might go through the roof. Houses aren't the only place decorators like to work on after all.