I have been a loyal wazer for years and use the Apple CarPlay interface. These are my suggestions:
A) The main screen should have THREE one touch HOT BUTTONS:
1) Object on road
2) Vehicle on Shoulder
3) Police

It currently takes two or three clicks to achieve these 3 most common alerts. The change can use simple icons and safety would be greatly improved.

B) When Waze re-routes me, it needs to give more explanation. Examples:
1) “Re-routing due to accident mile marker 204”
2) “Re-routing due to traffic saving 10 minutes”
3) “Re-routing due to construction”

Thanks!