I noticed most of the posts on this are rather old, however I would still like to had my 2-cents...
Apple makes a great phone (iPhone) however they should stay out of the map business. The Apple map program is a rather poor attempt at a mapping program, far behind Google maps, Garmin, Magellan, etc. Many of the destinations are still incorrect, and the directions I get seem to want to take on some sort of scenic route through the bad side of town.
I have used Waze for years, now switching to Apple maps with Carplay seems like stepping back to the 2003 when I bought my first GPS. (Although my first GPS was clunky, it was at least accurate).
If Apple wants to depart from phone design and get into the navigation business, they should either subcontract the service to Waze (or Google), or design a competing system that actually works. Although, the simplest solution would be to simply allow Waze onto Carplay and be done with it. I am sure they could find a way to keep their advertising revenue like they do on everything else.
Steadfastly adhering to this poor excuse for a mapping program may wind up costing Apple customers if a better solution comes along. It has happened before when Apple first came out with the iPhone, they partnered only with AT&T, and steadfastly refused to sell a Verizon or t-mobile iPhone version. This late entry into the Verizon market allowed the Android phone a long time to gain a firm foothold.
Apple, please get with it.