I've always wondered this playing Genealogy of the Holy War, but what made having Major Blood so special than having Minor Blood? While I get only Major Blooded characters can wield the Divine Weapons of their respective bloodlines, it still never made sense to me storywise. Were they meant to be the next incarnation of the Crusaders to stand against Loptyr? or were they simply meant to signify who was important and who wasn't?
I do like that three Houses kind of abolished this kind of weird mechanic as it doesn't matter if you have a Major or Minor Crest you can still wield your bloodline's Hero Relic or Sacred Weapon. But why didn't they just call them Crests then?