I've noted in the past my mixed feelings about Sorcerers (or at least I think I have)
On one hand, I adore the idea of magic from bloodline, and how that affects a character. However, I feel that concept of a character shaped by primal magical forces isn't emphasised enough by the current 'Spontaneous Vancian Caster' Sorcerer.
Sadly I don't have access to my computer at the moment, so I cannot properly put the class together, but I thought I would throw some ideas out there.
Sorcerer as a class akin to Kineticist or 3.5 Warlock.
d8 hit die and 3/4 BAB
An at will blasting power based on bloodline that improves over time (Example. Draconic starts as a simple close range energy blast, but becomes a cone or line later, and can be further augmented as you level up.)
Bloodline specific arcana/wild talents/etc. to gain new abilities like natural attacks, armor, and various useful and thematic things. (Example, any bloodline with claws can get 2 at will claws as a talent, or physical augmentations akin to abyssal as a talent)
A 'Battleborn' Archetype that replaces your blast with a powerful, soulknife-esque magical weapon and gives access to new talents.
Something akin to arcane pool that they can use to augment various spell like abilities.
A 'Bloodrage' talent that lets them act like Bloodrager for pool points.
Admittedly, aside from just figuring out core features, the most difficult thing in my mind is making talents and incantations for every bloodline.