Some interesting theories there.
I've tried CDC dubbing (home made) and what i found it good for, was trapping tiny air bubbles
Great for emerger flies and Corixae.
However i prefer to use natural furs for dubbing and you will find Water rat/musk rat is naturally waterproof.
It adds some interesting effects, i too love Mole and Hares ear, but also use squirrel, oppossum, camel and anything else that is nice and soft and or has nice smallish guard hairs, all depends what i want to use it for
varying the density of the fur gives you huge ranges of effects andit is easier to work with.
I'd keep the CDC for spinning
in a twister, legs and crumpled wings
Thats what it does best IMHO
Sandy