DEREK.
It's never not. I treat Defense like it has no leader and that seems to help, but when it comes to something important or dangerous I bypass completely and give an order. Which I feel bad about, but I've only done it once and that was when we found out that the infection could be contagious.
Another good point. I've got down time, I should probably write up some... I don't know, monster manual for the things that we find out there to keep everybody in the loop.