Putting is an art not a science.
How any of you can play virtual golf confronted with all those numbers is beyond me.
A small example say at Oakmont #2, you are above the hole 15 feet away and the down slope is 6 inches, so a 9 foot putt effectively.
If you add the slope and lets say a severe break together, what do you think you should hit.
The answer : hardly anything at all, because the run out from slope and break will virtually take it all the way with just a tap to get it rolling.
All the charts in the world cannot cover that scenario.