Waze zooms in and out great! So does Google maps. I'm not sure what problem you are having there. I've tried various mirroring apps for my phone so I could use those maps, but unfortunately, all the apps reduce the screen size of the maps...which kind of defeats the purpose. Android Auto shows promise, but you have to upgrade to the 8100 or 8200 to get it...and if I spend money on anything, it won't be on a Pioneer. It will be something that gives me the mapping software I want. The maps in all my AVIC-Z* units all zoomed in and out manually without any loss of function. Impossible on the 8000. I still have a couple of those units and I'm tempted to reinstall one. But man...the rest of the 8000 is so superior to an old Z series.
Did the map upgrade change the zoom functionality at all?
Seriously...if I need to have a decent mapping system up, I have to resort to Waze or Google on my phone and use it...and that's a shame after what I paid for this thing.