Hi. I have a brain Dural AV Fistula which was treated by embolization in April last year, so a bit different from you, but I have been surprised by how long it has taken for me to feel better. Im not sure I’m better yet (and I may need a bit more work) but while an embolization seems like a very low impact treatment, I think it can take a long time to feel better.
The other thing you have is that your AVM, being in your face, is in a very sensitive location. The face is full of muscles and nerves, so any effect of imperfection is magnified. I had a carpal tunnel release surgery in my hand a few years ago and learned that the hand and face are very sensitive in this way.
I think you are still quite early post operation and more time may help you get better.
Very best wishes,