The one area where I will agree with you is continuing to allow important starting players on the field in absolute meaningless situations. In that aspect, I do not think that it has any benefit whatsoever.
As far as running up the score, I think that it was an opportunity to continue to try and get Vereen some reps without having to worry about his blitz pickups and blocking. In that instance, it's good to see Vereen familiarizing himself with not only being on the actual field, but hearing specific running calls, hitting specific holes, etc.
I would have however, put in many backup players. Light's injury will likely be costly, and we hopefully dodged a bullet with Arrington. I just don't see much reason for some of those players continuing to play. It's not like they are working on too much...now the offense, that's another story. In my opinion, they almost used the last quarter as an extended practice at times. The Chiefs effectively almost 100% shut out Welker entirely, and Brady only completed several passes to actual WR's. That side of the ball will likely still gain something from continuing drives, but as we saw the negative effect may be horrible in the injury to Light.
