Why doesn't Apple focu on fixing their 2D maps and Google release a standalone Maps (not earth) app?
My guess they probably are. The problem is: It's competition.
You'll only see results of Apple Maps apps with final changes and tweaks or Google Maps with 3D and who knows what more near the iOS6 release.
Until then, little to nothing we will see of the full power from both apps, regarding coverage and usefullness of the app itself.