Echoing what the previous poster said, the depth is still there even if Grundstrom makes the team out of camp, and despite Johnsson, Kapanen, Soshnikov, etc. all graduating.
Korshkov has verbally stated he will be coming to North America for the 2018-19 season, which is probably the biggest addition (over 155 career KHL games) as he'll immediately be the top forward. Engvall, who has considerable pro experience already, was just given a PTO (.65 PPG in the SHL this season), and Marchment just earned himself an ELC last week.
Expect bigger roles for Bracco, Timashov, Brooks, etc. and you're looking at a top team still.