I really like the city map update notifications with the streets added/changed/removed sections. I recently got a few for cities that I’m close to completing, so a number of the new streets were in already “cleared” areas. It would be neat to have an option to display all the new streets from an update on the map simultaneously, to make it easier to create a route to capture them. Having to click on each individually is a bit painful…
I think it would also make sense to group nested cities with the parent as far as the update schedule is concerned.