Do not worry to mutch with Morale.
Try to use the blue the Best you can, your Team can still win with low moral, probably you will see more cards or even have mor dificult against stronger teams, but i already won 3 games by 6:0, 8:0 , 8:0 in a row with all the players low moral.
The moral is very dificult to raise, If you win they might keep the same or slightly decrease.