I've never smelled the oil, but I have the herbal tea. And it stinks pretty much as you say (I'd call it concentrated dirty socks). I think the herbal tea is usually mixed with large quantities of other pleasant stuff like chamomille to make it palatable.
I also grew the plant a few years. The flowers are cute white clouds and don't smell bad, and the fresh root has a good smell. But once you dry it, it develops the characteristic odor. I put the roots in the oven to dry, and soon the house was filled with the stench.
Good idea about adding it to flowers. However, I'm afraid the effect could be something like the swampy effect of the drydown of many florals (Bas de Soie, Love in white, Eden).