Route Alerts
The shortened route alert should have user specified times. I do not care about saving 3 minutes on a 6 hour drive. There should also be a limited number of times Waze asks for this route. My last trip I ended up just letting Waze reroute me onto a toll road costing money because it wouldn't shut up about the 10 minutes I would save on my 3 hour trip.
There should also be a user settable feature where you can select how much you are willing to pay to save money. If an alternate route is faster but a toll route I'd be willing to pay about a buck a minute saved. However if the toll route is saving 10 minutes and costs $40 I wouldn't want to take it. That is a tank of fuel for most cars at the expense of not much time.