The world does indeed look very different from above. Being able to pick out landmarks while flying to get your bearings is quite difficult and you don't realise who unstraight some roads are when you're driving along them. You think something is due north from something else but it's more to the NW when you're airborne.

Anyway I think the details are great as they are. This is a map, so representations of things on the ground are all that are needed so I wouldn't worry about the horses - they are definitely recognisable as horses