
Kazaan |
There's Eldritch Heritage which allows you to gain the Bloodline Powers (and only the powers) of a particular bloodline, even if your actual Sorcerer class bloodline is different. For example, a Draconic Sorcerer could take the feat Eldritch Heritage (Orc) to gain the first Orc bloodline power, though not its feats, arcana, etc.

andreww |
Crossblooded is only really worth it for people heavily investing in evocations and going Orc/Draconic for +2hp/dice damage. That can let you reach encounter relevant equal CR killing damage with evocations. Otherwise it simply isn't worth the loss of spells, even with the human favoured bonus especially as it delays you an extra level before you reach actual new spells (as opposed to spell slots).
Waiting until level 5/7/9 before getting your first known level 2/3/4 spell is painful.