Lately, I'm rarely in Driver mode, so I am not annoyed with walking mode in that instance. But I do agree it should have some sort of ON/OFF toggle for use in Surveyor. I can see where it might be handy to check height above ground for content (especially bush/tree splines on the side of hills). Outside that instance, zooming down close and jumping into walking cam is really annoying. The jump back wouldn't be so bad if it brought you out the same direction you went in. However, hitting ESC will take you at least 50 feet away in any direction and you have to navigate back to where you were zooming into. Very poor design of what could be of potential use.
Bill