It would be nice if we could view all the streets in a particular map without having to be in that region.
If my friend were to say that she was at the Great Hole to Ix, and I had no Idea where that was, I think it would be convenient if I could click each region and see how I'd be able to get there.
A plus would be if you could use the GPS to auto walk you there, or auto walk in between regions (or at least between regions or maps already visited before.