In v4.0, the minimum distance for icons to display has been reduced considerably from in v3.9. It is cleaner, which may be what you were going for, since a big design trend today is minimalism, but it comes with a loss in user experience.

As a user, I'd like to be able to see all report icons along my entire commute or a large part of at once, in order to minimize the amount if panning at a closer zoom, to easily hold the state of the entire route in working memory, and to easily compare alternate routes.

Currently in v4.0, I need to zoom in to a small region to get the icons to show. Then I need to pan, pan, pan many times down the route to get the whole picture. This loses the forest for the trees. It is harder and more time consuming to evaluate the route. Also, excessive panning isn't something you want to be doing while behind the wheel. v3.9's minimum distance for icon pop in was greater, and seemed to work better for these purposes.

v4.0 does have the colored dots, but these are easy to overlook and do not connote enough information nor do I find myself remembering what each color means.

Perhaps an easy way to address this would be to add a setting to set the minimum distance for icon pop in.