If Kassian is utilized correctly, he'll be fine.
And that is, on the 4th line creating energy and commotion.
Kassian looked lost because AV started playing musical chairs with the line up during the dark days and he was being paired up with different team mates all the time.
If AV can keep the line ups together through the series, Kassian is a good option on the 4th. Also, having Kassian in the line up allows AV to pair him up with the Sedins incase the Kings get a lil "overzealous".
If stuff starts going bad and we drop one at home, then Bitz's experience is a better quality to have.