Potential for AW Seasons to be won by bribery
One alliance's total AW score in each AW match includes a component for "defenders remaining". Theoretically one alliance could offer gifts to the other alliance to leave some defenders left standing. This need not even necessarily be for throwing the match, but even just asking them to leave 5 or 10 defenders alive, could give the first-mentioned alliance an undue advantage. Especially considering this score is accumulated over many wars.
Yes it is true that it would not be in the interest of the other alliance to leave some defenders left standing since they would lose out on points. But that may well be possible once the war is decided because the offering-alliance has too high an attack bonus to overcome. Also, it cannot be ruled out that some alliances may well offer ridiculous sums in gifts in order to secure the slightest advantage.
I guess what I am driving at is this: to make AW rig-proof, the AW score that an alliance can get must be determined only by whateverthat alliance can do, and not be influenced by the other alliance.