Nobody knows for sure how SAs work, the players who have them should had a advantage in that kind of ability, but most of the time they seems very useless.

About Morale, for my experience, If it is to low the players seems to catch more cards and more troll results can happen.
But it is not the end of the world, i already won 3 games in a row by 8:0, 8:0, 6:0 with all the players with low moral. It probably can make the diference whend you face similar Q opponents.