While I don't have any knowledge about how hard it would be to do such a thing, I must agree that it would be nice to be able to see our city's at different angles. When I go and look in on the top city's I can't really see how they keep track of what they have due to some buildings being taller and blocking out whole buildings. The art and animations on this game is amazing and it would be nice to see things a little clearer.
Curious, I looked into some player tools I had heard about and I found the city planner. Very cool tool. You can custom place stuff you haven't received yet and play around with arrangement, test your layout as you prepare for new stuff. I was a quarter of the way through recreating my city when I discovered that if you go to ElvenStats.com, you can import your current board at any time. It is color/symbol coded board, but you can clearly see the grid and see where your open spaces are, and test layout adjustments. If I play around a lot and want to reset, I just reimport current city. It won't give you cool graphics and animations from other angles, but it solves the problem of "what's back there?" and "is that square open or not?" and "how many squares are hiding back there, how much do I have to work with?" For this, very cool.
When I went there, there was no password or anything. I haven't tried viewing anyone else's city this way, but I encountered nothing that said it had to be mine. Appears you can import any (?) city. Obviously, you can't affect the real thing, but for a few clicks, you can see what's going on.
update: I have two city planner tabs open... one is my current city, and the other is that one modified for testing. Flipping back and forth to see some differences has been helpful.