Maybe they could introduce families under/above the species, guild organisations along with the reputation system.
Something like the families Harry Potter (Potters, Weasley's) or the Tooks or Baggins from lord of the rings. Then you could be affiliated by race, guild, family. This could give complex interactions.
You have fallen from grace in the wizard guild, but luckely the guild leader is a member of the *** family and you just saved a member of the family and word gets around...
Not in the mood for cheese? That excuse has more holes than a slice this fine Gorgombert!
