The surviving members of the Officer Corps, past and present with 15 years service would probably not require an extra "print run" of LSGCs which exceeds the 10 thousand odd Afghan medals awarded. Maybe TTN has a view.
Well as someone who won't be entitled no matter how far back they backdate it (only 12 years reckonable service) I suppose I can be neutral. Personally I think that any surviving officer who meets the length of service criteria should be able to apply no matter how long ago his or her service. Shame I won't be getting one to sit beside my lonely GSM!