The story of Edmonton's playoffs for me hasn't even been their goaltending or defense. It has been how trash they are at holding leads the last 2 series. 4 of their last 5 losses they scored first. All 3 losses to Vancouver and then last night. They almost lost game 1 to Dallas after going up 2-0 as well.
The Oilers have actually scored first in 12/15 games these playoffs (4/5, 6/7, and 2/3). Only once have they come back to win after getting scored on first (game 2 against Vancouver).
You just aren't going to win a cup when you can't hold leads. I don't know if they start playing differently and just can't learn that's a bad idea or if they are bad at making mid-game adjustments.