1. Lack of Depth
This should honestly go without saying. The Edmonton Oilers did not have the depth that the Winnipeg Jets had. Draisaitl and McDavid led the team in points during the playoffs and after the two of them, the best a player had was two points.
Nine players on the team did not register a point through the series, and while yes that is understandable during a four-game series, some of these guys had to be more effective.
Offensively the team road Connor McDavid and Leon Draisaitl, the two were on the ice more than any forward, and defensively it was Tyson Barrie and Darnell Nurse. The Oilers need to do a better job splitting up the ice time and making sure they trust their third and fourth line guys to play. Obviously, the team is going to want to double shift McDavid during a close playoff game, but if the coach cannot trust the other players on the team then why even dress 18 guys for the game?