Okay, since you asked, here is what I want. This applies to auto units only. What I would like is a routing engine that works. That means: One that actually finds the best route, one that knows the difference between rush hour and not rush hour, one that doesn't try to route me into the teeth of the worst traffic in the city, one that knows what speed people actually drive at an any given road and what the expected delay cause by traffic lights is (and knows this as a function of time of day and day of the week) so that it can actually find the fastest way to get somewhere and finally one that has an accurate and up to date POI list so that when you get to where you are going, it is actually there.
Do I need MP whatever, no. Do I need bluetooth, no. In other words, I need a navigator that actually does an efficient job of navigating.