I hope the appointment with Dr. Wilkinson went well today. When I went in to see Dr. Wilkinson, in late December, to get my stitches removed, he prescribed a 2nd round of steroids. My facial nerve regression seems like it was similar to the way you describe your son's. He also prescribed eye drops and lubricant (over the counter).
I also took weekly facial pictures (smile, pucker, loosely closed eye, and tightly closed eye), and sent them to Dr. Wilkinson weekly. In this email, I also mentioned any other concerns/issues. He wrote back within a day every time. So don't feel like you're abandoned. Open up that line of communication. At one point, my wife and I noticed new stitches around the surgery area. I thought they had missed some, and asked Wilkinson about this. He said they were internal stitches, that had come to the surface, and he advised that it was OK to remove them.
This is a tough surgery, and it results in a long recovery. It's going on 3 months for me, and I can still feel some stiffness in face. The smile is back, but the eye still has some issues. Hopefully, your son will heal quicker, since he's so much younger Urge him to be patient, and measure the recovery time in weeks, not days. Every day/week will be better.
One other item. My situation improved dramatically, after getting off the 2nd round of steroids. I started sleeping much better, without the aid of sleeping pills, which I had to take while using the steroids. My words to Dr Wilkinson at that point were, "I'm starting to feel more normal".