Enjoyed reading your AAR it is always interesting to get other peoples thoughts on the rules.
If I may explain my rationale when writing the rules to include units on full attrition quitting the field after falling foul of the 10% rule. Think of the failure as being part of the bigger narrative regarding the particular unit in the lead up to battle, a veteran regiment for instance may seem to be in fine fettle with its full complement of attrition as you order it forward but what if,
a) It was badly handled in its previous engagement.
b) Has no confidence in its new Colonel.
c) Has a high percentage of new recruits.
d) Feels it is being sacrificed ( once again ) in a futile attack.
e) Nearing the end of its enlistment and sees no point in taking risks having done more than its share of fighting.
These are just a few of the plausable reasons why a unit may unexpectedly perform so badly when engaging with the enemy,
thinking of the outcome in this context also helps soften the blow of rolling such abysmally low dice in the first place !!
Kevin