Tbh one could argue you don’t even need hindsight.
We had kadri, he made like 5 million, he gave like 60 points and sometimes played with not too great linemates. I know “when that level of player hits the open market you don’t think”, but I think you do. We had our cornerstone 1C, we had our 2 wingers and our future 1D. Kadri was more than enough as a 2C and we just didn’t believe that was enough. This was before the second suspension too so it’s not like he was a liability in that aspect at that point
As for me, with hindsight I’d probably move nylander for a defender in 18-19. Whether pesche or paryako or petro was available I’d have tried my hardest to do it. Our offence was more than good enough to win, imagine a shutdown pairing of muzzin - petro/pesche instead of Zaitsev. Or running 3 incredibly strong LHD or Rielly muzzin paryako. Nylander has become an incredible player but at the time was a luxury not really needed, we had the big 3 + kapanen, kadri, johnsson. We had our elite G and I think we could’ve gone all the way if we made that move