I believe the right (or more confident) diagnosis WILL change management. Many PCPs who are faced with a patient who presents with atypical symptoms today are either extremely cautious and delay initiation of treatment irrespective of the possible diagnosis, or take the other extreme approach and just stick patients onto drug therapy to see if the patient responds positively. Many PCPs faced with an atypical presentation spend a lot of time and effort in differential diagnosis over months and years already.
In future, with the opportunity to assess amyloid status early on, I think PCPs in particular will change the way they manage their trickier to diagnose patients. They will intervene earlier, come to a differential diagnosis earlier, counsel patients and their caregivers earlier and more confidently. They may be less likely to refer patients for further evaluation. Drug intervention is only one part of what one can do for the patient and caregiver and earlier initiation of a treatment plan has been shown to be more effective in symptomatic management, especially in early onset of dementia-like symptoms.
I think dementia experts will also change but maybe not as much. A challenge will be in encouraging experts to accept that they make mistakes and could do with help...
Definitely Amyvid is a leap of faith, but FFS what are we if we don't invest in new ways of managing these kinds of diseases. If you don't want to be part of this kind of thing why not move to selling generics or me-toos. No shame in it, far less risky (sort of)