One of the things that bothered me most about the game was watching Tyler Rouse get so many carries after leaving the game earlier with a head injury. He visibly wobbled off the field.
There is so much we don't know about head injuries and concussions, it seems best to err on the side of caution. I also worry about putting the "play/not to play" decision on the coach and player. They are tough, competitive people. They are always going to play. That is why it should not be their calls. It should be a medical decision.