Sent letter to AG. (No, not Andrew)
Received a reply last week. AG sent a letter to Allstate HQ asking for review. Allstate has 10 days to reply. AG also suggested filing a complaint with Dept of Commerce, which regulates insurance companies in MN. Did so yesterday.
In the meantime, I took car in to Tires Plus to have alignment/suspension checked. They found a bent left steering knuckle. Repair cost ~$500. Sent that to Allstate. Waiting to see how that impacts thier decision. Car could now be considered "totaled" - cost more to repair that car is worth.
Will post more as replies are received.