I love the idea of having loads of level 1 slots instead of sorcery points! Gives them ammo for spell slinging Magic Missile/Chromatic Orb/Burning Hands/Thunderwave, helps make up for not having ritual cast, and leans hard into them having innate magical ability. Simple and elegant.

Though it could be hard to balance since sorcerers could specialize in whatever they want and outshine other classes. Divine Soul having loads of cure wounds/healing word comes to mind.