As mentioned countless times, it all comes down to what the Rangers feel is a building block. Then again, that was speculation on the part of Bobby Mac so perhaps there's flexibility there.
Then the next big question is whether or not the Rangers can actually sign the players people are advocating for in place of Kreider. Sure, Kevin Fiala, Dante Fabbro, and a pick plus Panarin sounds better than "just" Kreider, but you can't assume any player will sign here. Not unless you're totally content with the end result just being the pieces you dealt for.
BTW, my phone autocorrects Fiala to Goals. That's a freaking omen if I've ever seen one.