I don't think it's a matter of defending the trade. Value wise, it's a stinker.
It's the pushback against people who are suicidal and saying they won't watch the Rangers this year over it.
Panarin - Strome - Goodrow
Lafreniere - Zibanejad - Kakko
Kreider - Chytil - Kravtsov
Barron - Rooney - Blais
Goodrow is replacing Blackwell. Kakko is going into his third year after being #2 OA. He's the one who is "replacing" Buch. Kravtsov is basically replacing Gauthier/Howden/DiGiuseppe. Ditto Blais. If Laf, KK, Chytil OR Krav breaks out, we're already better than last year, and more diverse and defensively sound. If a few of them take steps forward, we're very good.
Let's look at it this way:
Kreider/Zib/Buch = Kreider/Zib/Kakko
Panarin/Strome/Blackwell = Panarin/Strome/Goodrow
Lafreniere/Chytil/Gauthier = Lafreniere/Chytil/Kravtsov
Lemiuex/DiGiueseppe/Rooney/Howden = Blais/Rooney/Gauthier/Barron
Goodrow is upgrade on Blackwell. Blais is an upgrade on Lemieux/DiGiussepe/Howden. Kravstov is an upgrade on Gauthier. Can Kakko step up and START to fill Buch's shoes? Can Laf/Chytil/Krav also take steps forward? If yes, we're improved.