Upload GPX, KML & KMZ map overlays
The ability to upload GPX, KML & KMZ overlay files directly to the service for displaying over the topo map without needing to self-host using a 3rd party service like Dropbox.
This will make sharing tracks and other overlay information on the topo maps easier.
Simon Davis commented
With free options such as OneDrive, GoogleDrive, DropBox etc available, its difficult to see how the the cost of storage could be met by NZ Topo Map