Although I am not a great putter (Average is coming up, but started VERY bad) ...
I have three points to add:
1. When looking at putt distances, go to reverse mode and move the pointer towards the ball and back to you (Overshooting the hole in each direction). This helps to understand both the actual distance (24ft or 24.7??) and the elevation (you may find that a -2inches is closer to -3)
2. On severe downhills, rotate the view around. Sometimes you can find the straight line ... this can help to see how much break to put on the ball to get into the straight roll into the hole.
3. go to YouTube and/or Twitch and watch some of the better shooters (fmagnets, young46, etc.) you can learn a lot when you see how they handle longer putts. Sometimes this is better than watching putting tutorials showing someones "method" Also, don't forget you can always pause & rewind to calculate how you would make the shot ...
p.s. great thread :)