Than what's the point of coaches?
The fact that adjustments haven't been an issue just means that Bednar is good at adjustments and they haven't been the reason they lost. Not that coaches aren't necessary.
I agree that last night had very little to do with tactical adjustments by the blues, but game 2 this year definitely did, and so did Vegas games 2-4 last series. Bednar's done a much better job responding this year.
I don't even think game 2 had to do with adjustments. Remember how awful they looked? They looked just like they looked in the second half of last game, and just how they looked against Vegas in games 2, 3, and 4.
That's how they look when they stop moving their feet and executing on their passes. It's an effort issue. They just get comfortable and stop playing. Then the momentum swings the oppositions way and it's tough for them to get the motor started back up.
Bednar's system relies on speed and puck movement, and above all else effort. It's not a defensive system like defensive teams that sit back and trap don't use much energy. It requires a lot of energy, because they have to forecheck really hard, back check really hard, and skate really hard on the breakout.
When they don't give the proper effort the system doesn't work.