Big "stop Waze" button
Sometimes (often) you just want to stop and close Waze. But you have to go through menus, which is DANGEROUS while driving. There should be a big readily-visible X on the main navigation screen. Or alternatively, a big readily-visible MUTE button.
Ron Graves commented
It is really annoying having to turn my phone off just to turn Waze off when I don’t need it any more or I want a new destination. Put a simple STOP 🛑 button that’s VIsible on your app.