I think they announced that the panning/zooming issue is resolved with the Apple Maps in iOS10. So hopefully that will be one less annoyance.
I wish this were the case. I'm running the iOS 10 beta on a 6S+ and gave Maps several seconds to load this area of upstate NY.
http://i.imgur.com/wi7HRqe.jpg
The dark gray grid persists. Yea, it's the first beta, but I have mostly only noticed changes in the interface and not the actual map data.