Shawnee on Delaware
Mandatory recon orders grant uncertainty since the opponent must think about the position of the bluff; moreover, having only one order to choose and not two (as you played) means that shortage of orders is more stressing and playing cards for orders is more necessary. In addition, playing a card for reinforcements for example means that you´ll be playing just 1 order of your choice, so decision taking is more severe and has high costs.
What he said. Much of the tension in the game comes from these agonizing choices. There's nothing like playing no card for orders, then watching your opponent flip for 4 extra orders. This leads to much sweating and biting of nails as you wait for the hammer blow to fall. Ditching mandatory recon orders makes it far easier to make the choice to hold the card, which is not, IMO, the intent of the design.