Staying healthy is a must for names like Jack Eichel and Mark Stone
This is easier said than done, given the random nature of hockey. You never know when a freak accident will happen to a player (i.e. a lacerated spleen for Mark Stone). It could swing a team's fortunes and either give them hope or take it away. It's part of what makes the NHL (or any sport) fun, except if it happens to your team.
Despite this, the Vegas Golden Knights have made the playoffs six of their first seven seasons. They've shown consistency and depth in that span, making them one of the toughest teams in the league. However, much of that depth has gone elsewhere, leaving the Golden Knights without much breathing room.
Last season, Vegas had AHL names such as Sheldon Rempal and Brendan Brisson on the team. It left the team in a struggle to produce goals and without an option other than winning a game defensively. But acquiring a big name or two can remedy this and leave the Golden Knights stronger.