There are two places locally where the lack of a proper path consistently annoys me, one is along Church Road and the other is on Ham Common. The business of this route, and the lack of a sensible alternative, is indicated by the width of the mud.
This is the only north-south route for some distance (unless you want to cross the busy Petersham Road twice) and it is ridiculous that there is no path here. Other greens that I walk on regularly, like Richmond, Twickenham and Kew, all have proper paths and are the better for it (though Richmond does have too many, but that's another story).