There are a lot of trails around here with "name=Great North Walk".

There are two problems with this:

1) There is only one official route, hence many of these are wrong

2) No individual way should have that name - only the overall relation should have this name. For a map of ways like this, see: https://tools.wmflabs.org/query2map/queryinmap.php?BBOX=148.710937,-34.716782,155.56366,-31.714149&name=Great%20North%20Walk&key=&value=&types=points-lines-areas-infos

Highway needs re-alignment since it has been duplicated.
New imagery available (in josm) from Maxar Premium Imagery. (DCS imagery is from 2015)

This industrial area needs finishing, and there is another missing industrial area just to the south

Nature reserves here - see NSW LPI Basemap

Hut, viewpoint and and cliff here

Power line needs finishing

This area is Warabrook Wetlands Reserve, however it is not very clear what the official extents are - the Newcastle council website doesn't even list it anymore.