It would be good to be able to select several waypoints on the path and update common parameters all at once.
For example I will select all the way points on the same path line and update altitude by +10 and all of them will be updated respectively.
Or when I move the selected group they will all move around respectively.
Or change the angle of camera for all of them at once... etc.
So these kind of mass operations on waypoints would be good.