First everyones favorite. Wildblooded and Crossblooded. By RAW they are both archetypes that alter the same features, and thus isnt allowed. Its pretty easy to Handwave this away, as Wildblooded really should never of been an archetype in the first place. Should we allow this?
Second question is something a little more interesting (to me that is) Can a Sorcerer or Bloodrager that takes the Eldritch Heritage feat trade away the bloodline power it gets from the feat for a Bloodline mutation.
This is a headscratcher that me and Oneyou found, as it appears that all the conditions have been fulfilled, but in a way that one would think shouldn't normally work.
From Bloodline Mutation "Whenever a bloodrager or a sorcerer gains a new bloodline power" note that it doesnt actually care about having a Bloodline itself. And from Eldritch Heritage: "You gain the first-level bloodline power for the selected bloodline."