I don't think plate/cinder/dross VW will die yet, ppl still want to upgrade those, and cinder is GOOD gil(saw one for 1.4M earlier) and I know ppl would do those VW just to sell cinder. Price may go up, but as long as there's demand for those items and they sell for good gil, ppl will keep doing it.
Those VW that doesn't drop cinder/dross/plate will suck a lot though.