Idea for adding icons shown on map for.....

I have an idea.

How much trouble would it be to show on the map, icons that depicts the location of the waypoints filed in the flight plan for each specific flight?

So when you look up a specific flight, you can see graphically its “filed” route of flight vs. the actual route flown.

I think it would be pretty cool to see how much each flight deviated from what was filed either by ATC, weather or just pilots seeking a more direct route.

I realize the map already shows actual flight path flown vs. filed route but knowning where the waypoints/intersections are not.