Has bungie talked about what will happen with all our class upgrade materials? I don't remember them mentioning class material conversion to the new singular armor material the stream.
The faction vendors had a long row of different packages under "materials exchange" in the Twitch stream. Looked like enough to trade in lots of different materials, though they did not show for what. At the least, I'd expect to be able to convert the current class armor material to the new universal one.