I have had several plastic repairs
first was the 7-12 jump, this was just to keep nerve stimulation in the area (as said by my doctor) and really didn't make much difference although if I press my tongue on the roof of my mouth is helps some with the smile. This was done by my neurosurgeon
I had fascia from my leg put in my cheek and this helped with tone of the face at rest (less saggy)
I had nerve from my leg put into my face, attached to the facial nerve on the "good side" and then muscle put into the bad side, the nerve was then used to innovate the muscle and this gives a delayed movement reaction on the bad side. This all was done by a plastic surgeon
The process took several years, had to wait for healing in between each step.
In the end my inner cheek is pulled out from my teeth more making cleaning easier, my eye lid closes to within a mm (but still gets dry and blinking isn't a fast as the other), my face looks pretty close to "normal" at rest and the smile is better, I think speech is better too.