My own personal blind spot lies in the fact that none of the players (Maybe Bryson? and 24-25 Quinn - and maybe Laffer?), taken in a vacuum don't have a place on a playoff team. Playoff teams are not some magical top-to-bottom McDavid clones. All playoff teams have role players. Evan freaking Rodriguez did just fine for FL.
The problem with the Sabres, as Mr. Thorny, PhD has pointed out repeatedly is that the construction of this roster forces those players into situations that they would not face on a playoff team.
Make the upgrades with vengeance and a cold, calculated malice, Mr. GM Howdy Doody!