Simplify UI for lite users
I know this may seem like a facepalm moment for many users, but trust me, I have friends out there who have given me feedback that Waze is 'too complicated' and find Google Navigation far simpler. I see one option is the first screen could ask 'Would you like to "Enter a Destination" or "Just drive around"?' just to make the first impression simpler.
Other tweaks could also be made for our tech-not-so-savvy users. This could have a major impact on retaining users.