I prefer more human input than just patting about trying to simulate the random . That said, I really like the noise this produces. Lots of crowd-pleasing swirlies!

It would be interesting to see how well this kind of noise would incorporate into something like the Burpwallow Method for noise editing.

For continental shelves, you could try importing the HF into Wibur and applying an exponent filter or remap altitudes. I'd think that would work as well for this kind of noise as any.

I also have to say this is a very attractive hypsometric gradient. It even looks good without the hillshade.