I was reading up on warlock patrons and sorcerers and I notice a difference between the two. Warlocks have specific patrons and sorcerers just have vague ancestry. Sorcerers have the blood of specific creature, but that creature is vague.
I understand why some people want generic patrons for warlocks, but I also like the idea of specific patrons too. Sorcerers could have some specific ancestors with unique fluff, flavor and powers.
Just think of the Brood of Dragotha, Scion of Graz'zt, Descendant of Raziel, Spawn of Demogorgon, Progeny of Cryonax, Offspring of Venerestra, Inheritor of Primus, etc, as potential premade builds for sorcerers. A Brood of Dragotha could have a sorcerous power that engulf's his weapon with armful flames and maybe get extra known spells related to fire and necromancy instead of the typical powers sorcerers of draconic origines have. An Offspring of Venerestra could get extra illusion spells known and a sorcerous power that confuses one opponent.
Why stop at mystical creatures for ancestors? Why not have some mystical human ancestors instead of just supernatural beings? Karsus, from the Forgotten Realms' past, could be such an ancestor. WotC already used him with the Karsite race in Tome of Magic (3.5). The Karsites were amagical, but it would be a minor retcon (and make more sense) to have them have magic in their veins. Heir of Karsus anyone?
PC's wouldn't have to be a Scion of Graz'zt to have Graz'zt as an ancestor. It could just mean the mystical blood is stronger in an individual or that Graz'zt is not too far in the family tree.
Maybe this idea is best left for a module, but if patrons for warlocks can slip in the PHB, why not these?