I use it to edge a lot of my wreaths. Alternatively you could try hard ruscus. It is quite a good filler with a reasonably uniform shape if you cut it down. For larger pieces like coffin sprays I use Phoenox palm. Terrific for giving the feeling of largesse and a touch of the exotic.
However I do also use leather for the cheap posies that folk want for the cemetery as it fills up well and gives your basic shape. The same as everything in life, it all has it's place ( even if that means the bin for some of you)