For me, this very well could be the deciding factor. I don't necessarily need Android Auto or Car Play, but I really DO need decent nav with real time traffic/road conditions.
I'm in the Boston metro area and we're in an economic boom and we have more traffic than ever. I won't bore you with the details, but it's bad enough that unless I'm just going to the grocery store or running an errand around town, every time I get in the car to go somewhere I mount my phone and monitor traffic while I drive, staying prepared to reroute on short notice. I'm sure the people in the NYC, LA, DC, etc. can relate.
I really don't want to buy a new vehicle knowing that I'll have to continue using my phone on a mount. It's 2017 ffs.
My wife has SiriusXM traffic in the latest UConnect nav in her car. The traffic data tends to lag what I get from Google nav, it frequently misses accidents and small and/or short duration jams, its dynamic re-routing is sometimes questionable, panning and zooming the map is sluggish compared to a phone, and even though we have the latest map data it's missing a major road reconfiguration that finished 3 years ago. It sucks, but it is just useful enough that it keeps me from reaching to check my phone most of the time when driving her car.
If Mazda had integrated SiriusXM traffic, and dynamic rerouting worked at least as well as FCA's UConnect, I could probably swallow my disdain for the commander knob interface and live with it. But with no AA or CP and no real time traffic, buying a CX-5 involves resigning myself to spend another 10 years clicking my phone into an ugly dashboard mount.
Anybody who has followed my posts on the diesel threads knows that I'm very keen on getting the 2.2D or even the 2.5T. Keen enough that I can probably overlook the nav thing. So now that it looks like AA/CP may never be coming after all, it's pretty much diesel or nothing for me.