tdgeek:
Robertson as DPM
No reason or benefit to give it to Shaw. I expect Greens and Maori party will be brought in as coalition partners, or C+S. Make a full team. No negotiations or concessions as they haven't learnt any, and not needed. Greens will need to focus on green not hard left and bring forward meaningful climate change measures.
Robertson isn't deputy leader of the Labour party. If Labour do that the Maori party will likely take 3-4 of the Maori seats at the next election.