Why has there been no movement legally on this in 10 years?
This should be seen as a condemnation of the criminal justice system in Scotland, in particular of the toothlessness of the SCCRC. I am providing a link to a retrospective of wrongful convictions in Canada. "The following broad themes emerge out of the commissions of inquiry in Canada:
Miscarriages of justice are inevitably the result of a multitude of inappropriate actions by a number of people, and solutions are usually rooted in the attitudes, practices and culture of the various participants who exercise authority in the criminal justice system.6
"Some problems, themes and mistakes arise time and time again, both in Canada and elsewhere. They are not confined to proceedings in the courtroom, but relate also to the conduct of police, Crown prosecutors, defence lawyers, judges and forensic scientists.7"
On page 13 is a discussion of faulty eyewitness testimony.
https://www.millerthomson.com/assets/files/article_attachments/Wrongful_Convictions_in_Canada.pdf