Thankfully, I do now seem to have just about fully recovered. I started getting tiny movements back around 3 weeks and by 6 weeks it was substantially improved. By day 33 I regained the ability to fully close my affected eye, and some time thereafter normal blinking resumed. Today, only yawning continues to feel like I have weird asymmetric facial pressures.
It is emotionally scarring though. I'm still less socially outgoing than I was before, and I now live in the constant fear that it could happen again. The slightest tingle in my ear has me racing to take anti-inflammatory drugs (NSAIDs).