Never mind the deterioration of map resolution, if you rely on the public transport capabilities of Maps in your iPhone you might want to think twice before you upgrade to iOS 6 or buy an iPhone 5
Apple’s switch to their own mapping technologies has left a gaping hole where useful transit directions once lived
If you have already upgraded What can you do (other than waiting until Apple catch up to where they were yesterday)
One option is simply to carry another older iOS device.
I’m lucky enough to have a first generation iPod touch lying around – this device is incapable of running iOS 6 and should continue to provide public transit times and directions well into the future
Another option while we pray that Google release a standalone Maps app is to visit maps.google.com and add their web app to your home screen
It’s clunkier (for example, you can’t search for directions until the page has finished loading), but at least it works