I don't like the sleep button either, and if it's Apples requirements I do blame Apple... however consider this:
Your done driving so you go into the menu, put Waze to sleep, then shut off the phone. Go into your destination. Later you take out your phone to look up something (email, txt, website, other app, etc..) and as soon as you unlock the screen it goes into Waze.
Is it possible at all to eliminate that behavior? If I put waze to sleep then lock phone, when I wake phone up it should return to spring board. Is this an IOS 7.0.2 thing or a Waze thing? Also without force quitting the app, sometimes Waze takes over the audio once you return to it after launching an audio playing app.
I realize some of this is "king" Apples requirements, but there seems to be some bugs to it.
PA, USA - iPhone 5 - Latest WAZE from the App Store