They are and have been updating the accuracy of maps and POI.
They have but if they had their priorities in line, nice-to-have-features like this would be added after the must-have MVP (Minimum Viable Product) features. Not having public transportation is far from anything viable. Clouds and poor quality maps for a lot of regions, plus 3D data for most cities is still MIA. All things that would belong into the minimum category in order to even compete.