If changing your FTP changes past history than this PMC graph is useless. The real analysis tools have an FTP per ride. The value of a ride 3 months ago depends upon your FTP then, not your FTP now.
Particularly for Zwift races/rides, it would be very useful to filter the riders by membership in a Strava group and/or a text string. There can be hundreds of riders riding on the same course and ...