Hey guys,
I just want to react about the poll of this topic. No matter the outcome of the poll, I think that what matter the most is that all the shaders follows the same rules. Thus, if the coronamtl stick with glossiness input, then the Hair shader should behave the same way. Btw, from these two workflows, one of them seems to stand out as the standard today and it's the roughness one. I think YOU (devs) have to make that choice, not us (users), because i think (in most cases) you are responsible for making adopt these new workflows by imposing them. I think that's how a standard become a standard. I think it's really great to ask user feedback and this is one of the thing i love with corona development but on certain subjects like this one, I think we should not intervene.
Of course, this my point of view and i will understand some people will disagree with me. I just want to introduce some constructive discussion about that because it seems important to my eyes.