I don't actually think that samaya with HH the Dalai Lama should override all other Lamas. We don't all receive teachings from HH, and what really matters is the guru or Lamas ( sometimes it can be more than one ) who has kindly given us the Dharma and practises, so if we only hold our samaya with HH, then what happens to the teachers who have been spending time talking to us, giving us advice, and have been very caring for us???