Add the ability to enable or disable Waze based on various factors, such as bluetooth being enabled, name of paired device currently connected, or if the phone is currently connected to a power source. I love the app but I often forget to turn it off or on. As a result, I either burn battery by gps staying on if I forget to turn it Waze off, or I don't contribute to the community if I forget to turn Waze on. This could also be accomplished externally through integration with Tasker, as suggested by these ideas :

http://waze.uservoice.com/forums/59223-client-how-can-we-improve-waze-on-your-phone-/suggestions/2485315-tasker-intergration

http://waze.uservoice.com/forums/59223-client-how-can-we-improve-waze-on-your-phone-/suggestions/2992251-sense-when-connected-to-a-specific-bluetooth-id-an

http://waze.uservoice.com/forums/59223-client-how-can-we-improve-waze-on-your-phone-/suggestions/3133462-closing-waze-from-an-app-like-tasker-or-by-swipin