I'm actually doing an Aura/Def General build at the moment... 5/5 in both and will continue to increase those as I gain levels.
I posted my build in the other thread and will provide a more stat-based update after another game or two.
As for my thoughts, Aura of Intimidation *seems* to be working. As far as I understand it, it affects all offensive players, so your defense can benefit from the aura as well. Some quick numbers... We allow 7.25 pts/game in 4 games played, only allowed two TD's (one resulted from a pick thrown from our own 20 in the first quarter though

) all season, and only 6 points total in second halves. In those second halves, we've had 2-3 crucial picks (one for the go ahead TD!) in very tight contests. My understanding of morale is that it will go up and down throughout the game, depending on your player's performance. My hope is that Aura of Intimidation will grind down the offense's morale all game, becoming the most useful when it matters the most: in the fourth quarter.
Take with it what you will... its a risky build and not one built for numbers, but it could be extremely beneficial if it works as advertised.