Anavex's drug is now being allowed on a compassionate or "special access" scheme in Australia, patients' doctors may apply to the TGA for access and all 21 patients from the P2a have already been approved for access to the drug because the 5 year OLE has run its course.
What you are describing is research, not data mining for the purpose of changing a failed trial into a successful one.
By the way, you have totally mischaracterized the results of the Anavex P2a.
To get up to speed:
AVXL Compiled Due Diligence 09/29/19 & more ********