Agreed. The fact that some data is not on par with current Google offering doesn't make the product a bad one. Data issues can be quickly solved, specially when there are so many users to report problems.
For a maps application, the best report is just the location of the affected user. Any lookup on existing maps for that location will show what the problem is.
That depends on the size of the dataset, and the quality of the reports. It's not obvious that this is true in this case.