Drysc says that even though the drop rate was lowered, something strange has happened-- the Mote of Shadow prices have generally stayed the same. Either someone had a stockpile, or the demand just isn't there. Of course, prices in the AH on every server are different (one server's trash is another server's treasure, so to speak), but Blizzard doesn't see a problem with Mote of Shadow right now-- if anything, they want them rarer.
I think the center of this argument really lies in how crafters are supposed to come across these items-- is farming supposed to be part of the game? I'm a big fan of the "you should get every craft item you need just by sweeping the landscape while you level," but obviously many more players go above and beyond that, and actually spend hours just farming craft items. Should Blizzard tune the drop rates for the farmers, or for the grinders?