Bloodline selection for sorcerers is severely lacking. I hoped that it would be expanded in WotR but with the release date so close I fear that this element will be neglected.
Among 50 available bloodlines from Paizo and around 70 more from other publishers we only have a pitiful choice of 9 in WotR same as in Kingmaker. Yes, I count Dragon/Elemental types as just 2 bloodlines. It is clear that type selection for them was displayed in the bloodline list to bloat it so it appeared larger.
Obviously, not all of the bloodlines from source material would work well with the game and implementing even half of them would take an absurd amount of time. But I think that expanding selection by at least 5 more bloodlines is reasonable.
Would be good to see any of those.
Shadow Bloodline - gets a capstone ability that makes shadows 20% more real. Perfect for stacking with Powerful Shadows mythic feat for another 20% and an ultimate shadow build.
Phoenix Sorcerer Bloodline
Unicorn Sorcerer Bloodline
Orc Bloodline - gets an inherent bonus to STR identical to abyssal bloodline. Since we can have two bloodlines with mythic feat another 6 cannot hurt. But Minotaur bloodline below is much more powerful.
And from Publishers:
Aboleth Bloodline - personal favorite. Extremely rare inherent +6 bonus to INT. Perfect for INT-based Legendary path characters who can dual classes.
Minotaur Bloodline - inherent +6 STR bonus and permanent size increase as a capstone.
Faerie Dragon Bloodline
Realms Beyond Bloodline