WTF, no one thought way of the four elements was you, at least until said that.
Hint, don't refute things until you are actually accused, it makes you look guilty, not saying you are, just that is the appearance it creates.
Anyway Favoured Soul is no more generic then Dragon Sorceror, less even. Unlike other Sorcerors you cast divine magic, not arcane, you have so much celestial energy running through you it empowers you healing spells, and you literally have an Angel Form where your appearance changes and you gain spectral wings. I mean the parties Celestial Pact Warlocks Patron COULD BE THE FAVOURED SOUL! The Favoured Soul has it's own celestial spark, filling it with Celestial/Divine energy.
So no the Favoured Soul is not the generic sorceror. The idea of the Generic Sorceror is antiethical to the classes very fluff, it's not like the wizard where a generalists wizard fits the fluff, or a cleric's semi universal domain of life.
The Sorceror's magical spark has personality, it warps it's barer.