I fully agree with your comments re 1000'AAL but
AFAIK the 'flag' appears at 1000'RA. 1300+AMSL at the FNC VOR is more than 1000'aal and it DOES flag, I can assure you! Whether or not there is something which looks at the aal bit I know not, but raised terrain on the approach path
will flag. ?
I am a 'monitoring fan', BTW.
No shooting of the messenger, please?