That's driven me nuts since Shafer has taken over. We had a proven 1000 back in Jerome Smith, and they drop his carries by 33% just so they can get other guys touches. The problem with that approach is that [1] it doesn't allow any player to get into a flow, and [2] it takes touches away from your best players--the ones you actually want to have the ball in their hands.
I chalked some of it up to McF***it's system, but it seems to have carried over. I'm all for subbing players out here and there, or even having a pre-defined platoon so that guys get a series off here and there. But there is no need to run 3-4 RBs per game [I'm not even talking about the hybrids]. Let Jordan Fredricks carry the ball 20+ times and see what he can do. I don't need to see him splitting carries with Morris / MacFarlane equally for no legitimate reason.