People have been asking about getting route number and street name for years now but we seem to get ignored. Have seen UK and Australians asking for street name. I personally don't care about the the voice instructions, which might be fixed but onscreen hasn't changed.
Have you considered it might be a Here problem?
I live in a tourist are and about 50%of roads give a route number. Very disappointing, you have made great big improvements but little ones like this?