I really really hope that they don't change the graphics too much. Two games that I used to really love (and still do, in there earlier forms) were Pharaoh and Rollercoaster Tycoon - I think they totally screwed both of them up in their most recent versions when the graphics went from pixel-based to 3D vector based wotsits (whatever the technical term). As much as they try and claim this looks more realistic it just totally doesn't to my eyes - all those strange angles and people with peculiar dodechahedron(sp?) shaped heads.
As has already been mentioned, one small thing I would like is some sort of splitting down further of the commercial zoning catergory into something along the lines of office, retail, leisure etc so you could be more specific about where you wanted shops, hotels, pubs . . . etc
Simon