the bloodlines are a perfect idea. I really like it. BUT:
A sorcerer is not a frontline character at all. So the claws shout be changed to an elemental ray like the Elemental Bloodline.
In addition the bonus spells for the bloodlines should be changed:
I see no sense in three spells like form of the dragon I, II, III or elemental body 1-4. Each spell is interesting and fits to the character. But if a sorcerer has “form of the dragon III” he might has no use of the “form of the dragon” I-II.
Proposal: on every even level the sorcerer can change bloodline spells as a normal chosen spells. E.G
If a sorcerer reaches level 18 he might change the “form of the dragon I” spell to any other spell of level 6.