I really like Mapillary but what bothers me is sometimes the lack of quality in some pictures. Some images or image sequences are useless because they are too dark, too blurry, sometimes the distances between images are like 500m and some images are so tilted that they are kind of useless too.
The suggestion is that while processing the image for the data collection, the images should also be graded with a quality score ranging from 1-5 based on different factors like described above. Later, users can filter images based on the grade just like they can filter based on time. In my opinion, this should enhance the quality of mapillary because people will be motivated to create better images.