It's not just the absence of Buff that changes the culture.
Without Little (injury) and Chiarot, Wheeler is the only legacy of the Atlanta days.
With the absence of Trouba, seniority in the Winnipeg Jets dressing room (based on games with the team, not age) goes something like this*:
(*super-quick calculation, so I'm sure I missed out/misclassified somebody)
Wheeler
Scheifele
Ehlers, Copp
Lowry , Perreault
Morrissey, Laine, Helle
Connor
The dynamic is completely changed with, for example, 21 year old Laine suddenly having more dressing-room seniority than all but a half-dozen players. Meanwhile, Scheifele, Copp, Lowry, Ehlers and Morrissey constitute a young leadership group that any teammate would respect, regardless of age.