Even with the Mavic Pro set to Imperial (which show correctly when flying), all the other distances in the menus are still in metric like RTH for instance. This appears to just be an oversight even in the DJI Go Version 4 (iOS).

I just want it reported, obviously I can do math and calculate it, but as a developer myself this is obviously an oversight in the code that needs to be fixed for consistency.

I dont think it is an oversight. As an imperial user, I suspect it is by intent that RTH, Max Range and Max height are locked in metric regardless. Someone decided to do this because they all equate to round numbers in metric and the equivlants are obscure numbers in imperial.  Min RTH= 20m Max range = 8000m  Max alt = 500m.  Could be wrong though, that is just my theory.