Its very nice when developer seeks an opinion from users, unfortunately this is not common practice. Corona has come a long way in a short time and there is more ahead, ( not to mention Maaac pleaseeee ). Desires are different, depending on the interests and needs of individuals, it is impossible to please everyone.
My modest wish is Corona team take a breath, and deal with polishing existing features like bump, lights values, mapping etc. instead of adding new at all costs.
I vote for: More texmaps (AO shader, Wire, Rayswitch, ...).... but wish all stuff, pronto, for yesterday :D
PS. whether somewhere exist explanations about new materials, Mix and Portal?
regards