The mission locations could probably benefit from some "flavor text" to describe what sort of location they're supposed to be.
Since each of the areas is supposed to represent some part of town, it would probably make sense for each area to have some lore and/or a brief history associated with it for world building purposes. It would also solidify early on that the different terrain types are tied to specific map locations.
Also it would help cut down on complaints like "why is this area all just rows of houses?" (of course it's rows of houses, it's a residential area!).