Maybe you could amend this section of the original post like so, to get the point across in a less confusing manner?
I had to review the pictures like 3 times each before I finally understood that what you are saying is that the UI is now showing us inaccurate indications for exactly where the threshold for attacks to gain advantage/disadvantage are. The thresholds may have actually changed in Patch 4 to require a much larger difference in high/low ground in order to gain advantage/disadvantage, but the UI is operating under Patch 3 standards when calculating advantage/disadvantage and chance to hit.