If we can't get a first for Pageau I'm all for trading him for a good prospect who might be able to be a part of any future team. Or we could also trade that prospect/player in future for something if he isn't in their future plans.
I don't think it comes down to either Pageau or Tierny this yr, I think it comes down to trading Pageau this yr & Tierny next yr. Given Ottawa has three good top 9 young centres coming in L. Brown, Norris & White there is no need to keep either Pageau or Tierny & I expect that White will be a much better player next season. If they are lucky enough to draft Byfield there is another guy who could be a future centre, although my guess is that he starts his NHL career at LW.
Ottawa also has Anisimov who can play centre next season, Paul can play centre, he & Tkachuk are both now taking faceoffs & Chlapik can also play centre if need be. There is no shortage of centres & who expects Pageau to be better next season & should he be part of Ottawa's top six at centre? I think they need to move him now because it could be harder later than it is now when so many are not paying attention to the Sens right now.