Good to see that some positive moves are afoot to preserve the natural beauty of the Hills area.
It is apparent that it's already too late for parts of the Foothills in areas like Koongamia, Greenmount and Swanview.
Places like Kalamunda, Mundairing, Glen Forrest, Parkerville and Rollystone are also becoming over populated to the point of ruining the natural beauty and eco balance of the Hills.
In some of these places is is already too late, but with rapid action to formulate management strategies such as you refer to, all may not be lost.
Good luck with your quests, and may the plans be implemented post haste.
I remember these areas some forty plus years ago, as they where my stomping grounds as a youngster. They look very different now.

Regards and Cheers.