With Celebrini, Smith, Eklund, Dickinson, and the addition of whoever they get at 2nd overall in a month, I think the addition of Marner marks the end of the rebuild phase for that team. Do I think they jump like 40pts in the standings? Probably not, but they'll have a hell of a lot of young talent on ELCs and plenty of room to add through FA or trades with the cap jumping like crazy over the next few years.
Chicago's in a much worse spot imo, and this team is easily in the worst of all three if you're viewing things through a like 5 year lens.