It's always Charing Cross (western) branch trains that stop at Mornington Crescent, never City (eastern) branch trains, so logically, it is much clearer to show it on the western branch! Whether the track is physically on the east or west side of the station isn't relavent when the train doesn't stop at that station!

Fair points, but there's always a trade off between geographical accuracy and clarity. While it has some advantages, the Mark Noad version could also make it more difficult for someone unfamiliar with the network to see where to change trains to get from station to station.

The Tube map is becoming less relavent as technology improves, anyway. It shows just one part of a very complex, integrated transport network. Showing stations more geographically might help a few situations when it is quicker to walk than take the tube, but there are also countless journeys where it is quicker to take a bus or National Rail train than the tube. Obviously you can't show all those or the map quickly becomes impossibly complex.

Even with semi-geographical accuracy it is hard to convey, on a map, the relative speeds of the different lines. It can't tell you that, for example, the Circle line is slow and clunky and often has long delays between trains, while, say, the Victoria and Central lines have very fast and frequent services.

We now have access to real-time journey planners in our pockets which consider countless combinations of routes to find the fastest way to get somewhere at any given moment. These are only going to get better with time.