Remember that Nidhoggr design rights was the no. 1 price for buying the most presale Rebellion packs. The group that won that price got really screwed by the current Nidhoggr design. If they allow Nidhoggr to remain as underwhelming as he is, then it can really diminishes the desire to win the design rights of upcoming sets.
RE: Potential Risks of Adjusting Nidhoggr: My Analysis