Because they cannot possibly compete with the team the way that it stands right now, with the unknown being how much of a step forward last year's youngsters take, not knowing how much of a Day 1 impact this year's corps of rookie's bring, and no knowledge of how the goalie situation (how much impact can the rookie make, will Georgiev take a step forward or back and knowing that Henke adds another year of depreciation.
They may well have their #1 C and #1 D, but there is just not enough support right now. And going crazy on UFAs to ensure there is support goes counter to everything that they have done up to now.
If no one steps forward (very unlikely) they will still be better than last season by adding Kakko, Trouba, Fox, and Kravtsov. If Chytil improves, I think they are a bubble team. They might be anyway. Parity rules the NHL, now.