I think people need to step back from the ledge a bit. As long as they can get out of their own way, this isn't a team that's in a dire situation going forward. This is exactly where a lot of people predicted they would end up when they decided to put their foot on the gas and "accelerate the rebuild" or whatever the hell that was. A core group that is lacking and a supporting cast whose development hasn't aligned with the timing of that core groups prime years. Largely due to some asinine draft choices, but it is what it is as this point.
The Rangers don't need to nuke everything. They just need to be patient in moving out this group of aging veterans that's sulking around. Kreider will have value. Trouba will have some value. Panarin will have value as a rental a year from now. Mika is the only piece that's an anchor but even then he can be pushed down the lineup into a role as a 3C / PP specialist. Smith and Lindgren should be guys that get some draft capital as rentals.
However, the hard truth is most of those pieces aren't the type to get you major hauls that will impact the top end of your roster the day after. Even if the team sells on Igor he's probably not returning a ransom because the market for goalies is always soft. So they're going to have to get creative in finding ways to add talent. That might mean taking a chance on some guys who need a change of scenery or are struggling for other reasons.
There are question marks in what they have but it would behoove the team to spend the next year figuring out what they have in guys like Miller, Schneider, Jones, Kakko, Cuylle, Othmann, and Chytil before they start making trades with the intention of targeting certain positions or filling those holes on the open market.