I don't see it as worst case. Barlow, But, and Wood are players that the Sabres could really use. Particularly Barlow. His game is exactly what the Sabres need. I don't see him being available as worst case.
Same with But and Wood. Especially But. If he's available, I see him as the Sabres pick. He's a power forward in development, that does a lot of everything aside from having an elite shot. Which means he'll be more apt to be a net front player.
Wood also has a ton of room for development but he's not a great skater, and Adams tends to shy away from poor skaters.
I think if the draft fell this way, Adams is deciding between Barlow and But, and that's a great choice to have.