The rumor that Trouba will block a trade to DRW has a lot of smoke around it.
The only way this could get done is if NY waive Trouba, which means Yzerman will be on the hook for his entire 8m.
The strategic way around this hurdle would be to trade both Copp and Holl to Rangers for NYR's 2nd round pick). That would free up 9m in Detroit. Gives DRW a 2nd round asset, and they eat Trouba's 8m. Rangers can buy out Holl and maybe they can use Copp somewhere.
That's just an example how NYR can skirt around Trouba's block.