Have you had a nerve conduction study?
I have foot drop resulting from a dislocated knee, torn acl/lcl/pcl and broken fiblua. My accident was in Oct 03 and the foot drop hasn't changed. After 2 EMG the nerve is not regenerating. My foot drop is probably permanent.
I had 5 months of PT 3days a week.
I know it's been awhile since your post but I hope things are going better for you.
Keep us posted.