Simon has this spot on. My view is it is somewhere to ride bone dry or frozen tundra.
My deliberately sporadic visits up there do show up the motorway width paths that are being ever widened by users of all types, and the boardwalk was a maintenance nightmare really… BUT the flagstones are not a fantastic solution and there are a few starting to sink and rock in the wetter parts. And are shit to ride on… One wonders if that might be a convenient by product of that type of surfacing.
Tricky… The friends on likely moor have had a stab at improving a situation, but I cannot help agreeing that a bit of consultation with some local trail builder chaps who know what they are talking about would have been good.