I think the problem you guys are having is interpreting the information the game is giving you.
You cannot take the elevation change at face value. You must check where the green is going up and where it is going down.
The total elevation change at the flag may say 6 inches up but that is a total. If your chip lands on a downslope it will run.
Move your cursor around to check the landing area.
Spin greatly changes how these shots react and can be used to vary the length of any pitch or chip.
I would say all of the great players here (I am not a great player) have mapped their wedges so they know exactly how they will come out of all roughs with all spins.
So basically what I am saying is the yardage given for the shot is a guide. It is up to you to figure out how it will react with the balls you use, the clubs you use and what the circumstances of the shot are.
So take the time to practice and find out.
Happy hitting