Finally, DJI just added a new version of waypoints for the Mavic 2 drones in a DJI Go 4 app update. So far the update is only available for iOS, but I would expect an update for Android users to follow soon. The vastly improved waypoints feature is the main improvement in this update but not the only one. Other improvements are optimizations of the software and the stability of the editor. Here is a detailed video of the new waypoints feature.