Personally, I still think the difficulty of savage is killing any will to do Savage. Far more people are willing to do NidEx than Savage for less rewards to boot, despite it having the same template as Savage - story content cranked up.
But then again, in our unofficial player poll 50% of the people weren't even interested in NidEx, so...yeah. If that's remotely representative, it doesn't take a genius to figure out hard content in general is just not considered fun by many.