Personally I don't think this solution is good enough. It's great to hear that Apple Maps is sort of open source in a sense, however it's no good releasing an app that's so far from having complete/accurate data, as well as completely taking away the complete solution that's already been in place for some time.
I am a regular Google Maps app user, and I've already lost the ability to successfully find places I need to go since the update to Apple Maps. My biggest problem with Apple Maps is the severe lack of quality or complete lack of satellite imagery. For me this has become a huge help in finding places visually. As well as this, Street View became extremely helpful. As an example, I tried searching for a place in Brisbane where I needed to attend a meeting via Apple Maps recently and I could not work out where exactly the building was. Then I used my uncles iPad which has not been upgraded, and google maps quickly allowed me to visually find the place via satellite imagery, as well as some points of interest, but also Street View allowed me to even focus on where the entrance was to the building.
Apple seems to think its just the Points of Interest that are the problem, however it's not! I'm surprised this is not getting mentioned more in this thread. The satellite imagery needs a huge rework and the addition of something like street view needs to be added. If I zoom in on my home town of Swansea in the UK, the satellite imagery all over the city and suburbs is just pointless as its so blurry, low quality, some parts not in colour and other parts totally missing! There's also a significant amount of roads missing, this is not something I can report by pressing a button. In fact, some places such as the Cayman Islands are completely void of any roads!
The app should not have been released so quickly and promoted as a complete solution, and completely taking away the previous solution that had been working so well. I understand if this was the only solution if relationships with google had broken down, however surely it's apples decision to remove the google maps app.
The only positive for me are that the Apple Maps look good aesthetically. It's a shame that I'm more of a hybrid or satellite user though.
In regards to reporting problems, apple needs to promote a more comprehensive solution in adding missing roads, area names, etc not just points of interest. It's a real shame all this work is involved in creating the app without a real backup solution (other than using google maps through the browser).