My family and I recently moved into a new housing development last Dec 2015 and our address is completely wrong in Apple Maps. I submitted the error to Google Maps and within 2-3 days it was corrected in their Maps. I made the same submission to Apple Maps 5 times with no response acknowledgement let alone any changes to our address in Apple Maps.
The maps are NOT getting updated timely by TomTom or whomever provides the GIS data to Apple for their lousy Maps app. I've had to tell friends and family to NOT use Apple Maps for directions to our house because they'll get lost.
Since Apple Maps is the default map app for all apps using my gps coordinates (Find My Friends, Find My iPhone), it needs to be updated timely or give us the ability to change the default map app.