yes, it does make a Kadri trade more likelier but it's not the end of the world.
But I don't see how the team giving out of the OS doesn't want Johnsson for multiple years.
2 years is the least likely option since the Leafs have the space for the 2nd year + you're taking him to 1 year from UFA status with him holding arbitration rights again.
Lets face it, if the Leafs didn't have cap trouble, they wouldn't be cheap with Johnsson and would keep him. Cap issues this season will be tough to manage around and something has to give.
I guess the point was it don't matter if it's 1 year or 4 years in term with anybody signing Johnsson to an offer sheet. The Leafs simply can't afford to pay Johnsson what he wants to be paid and the problem is the next season in terms of cap space.
My guess is Gardiner, Marleau, and one of Johnsson or Kapanen are gone. I think they would like to move Zaitsev as well but he is the only RD and that contract is not easy to move. I don't see Kadri being moved cause they still want to be strong up the middle. Nylander is another but doubt any team gives the Leafs what they would want in return.