TDA is a red herring, he's got one year left. Ristolainen is an issue, but a not unreasonable buyout candidate if a trade doesn't develop.
Just suppose they can't actually move Hayes for three years.
Are you saying they can't do anything until then?
Suppose the "splash trade" involves Hayes, TDA, and/or Ristolainen?
Even a Hayes buyout gives you pair of $4.7M cap hits and then three years of $1.6M. Not unbearable in a "rebuild."
The team doesn't need a splash trade at this point, but they would be irresponsible to not keep an eye on everything that's available out there.
And that doesn't involve sending their goalie and their top prospect to Montreal for a freaking winger.