I don't think the team will be worse, it should be a much more competitive team overall (less blowout losses, but potentially less blowout wins too). What has to go right is Kakko, Krav, Laf, and Miller (Nils too a bit) need to become the difference makers, because our vet core has proven to not be enough.
To make the playoffs in the East this year, your team has to be over true .500, not just NHL .500. It will be a very competitive conference, I do not think the playoff teams from last year will go down easily, they each have at least one more left in the tank. Should be a war. Not much is going to separate the 3rd place teams plus the wild cards in each division.