Well, Dr. Aisen should certainly be informed and one would expect his influence would help AVXL be visible at least. After many years of field interfaces w/FDA and others I can say many are strong talented people but they also have some complete AXXholes. I sat in a closing meeting one day with a female FDA Investigator/inspector w/Consent decree, she put her .38 cal revolver on the table and conducted the meeting. I have seen them rush and spread out from an opening meeting intentionally rushing ahead of the escorts to get evidence from peoples desks. But on the other hand they are lousy jobs and a lot of people will try to lie to them. I have conducted 3rd party medical device/pharma investigations after the FDA has left w/o finding N/C and found very basic/serious issues which should have closed the doors. Some really good people but a lot of not so good. They make mistakes like anyone else.
Unless there is a concern about his credentials/specialty and scope of knowledge and assuming no concerns over conflict of interests, he should be a beneficial resource for AVXL, IMO.