As others have said, we already worked through Thralls family issues in WoD. I fail to see the appeal to do it again in SL.
If they had wanted military fanatics then they could have gone for someone like Whitemane or any of the orcs, like Grom or Blackhand. If they had any foresight then they could have used one of the dead nelf generals.
- - - Updated - - -
Eh, Talanji was fine for what she actually was. Not nearly as bad as the already existing cast or the instant-conversion nelf sentinell jokers..