ORIGINAL: Straightarrow
Stabilization isn't your only concern on a hunting arrow. You also want something that is forgiving if it nicks a twig on the way to the animal. Nothing comes close to feathers in this area. They fold out of the way, while a vane bounces off.
That goes for rests , risors ,cabels , and sights allso , basicly anything your fletching might or will hit , feathers are way more forgiveing . Those of you shooting prong rests with vanes try shooting your arrow with the cock vane in the opposite position , see what happens , whith feathers the effect would be minimal to nill .