Honestly, I think Machidas better off dropping down to mw. Jones is a young champ who's probably going to be around for many years to come. Machida also has more years left in his career than Anderson, so once AS retires, he will be a force to reckon with and has an absolute real shot at taking the MW title. Plus, I'm DYING to see a match-up between him and Cung Le.
I think Gustoffson, if he wins, is a much bigger threat to Jones than Machida is at this point anyways...