I expect Captain Mark Stone to be out for the remainder of the playoffs. I just don't think there's any chance he's healthy enough to play. That's a massive loss for Vegas; aside from being the Captain, he just does everything really well. D-man Lauzon missed most of the Anaheim series, and while not a great loss, it does create what I really think is the only real hole for Vegas and that's the 3rd pairing Defense.
William Karlsson coming back for the Anaheim series after missing 60+ games was huge and it took him a decent chunk of the first half of the series to get up to speed. His return mitigates the loss of Stone to a degree.
The biggest weakness (arguably?) for the Wild, depth at Center down the middle, is most definitely NOT a weakness for VGK; Eichel, Karlsson, Tomas Hertl, and Nic Dowd are all more than capable, while Marner, Howden and Sissons are all capable of stepping in at Center.
I think it's going to be a heavyweight title fight, no doubt about it.