"Now we’ve added the Marram grass to give the area more of a links look and feel."
Brent nails it. If the 7th now looks more like a links hole, what was it starting to look like before you added the new grass? Or, in the alternative, if you hadn't added the new grass, what exactly did you fear the hole would become?
Or is this rather a 'fix' (scare quotes) to a self-inflicted problem - your removal of the original gorse?
Bob