He discusses it more in the thread there.
Also why the talking heads are often wrong, he calls out Bieksa for saying it was Marner.
They don't know the systems.
His analysis is a bit broken saying that Knies shouldn't be keen on the strong side D with a high puck carrier while Marner is correctly placed our of a danger zone on a non passing option.
He's correct that we play man on man, what happens is Benny and Knies get jumbled up and Pasta goes to the high slot. Marner should read and switch from his loose point coverage once that occurs, instead he plays tighter on point and it pulls him out of position.
A few things could prevent the goal
1. Knies taking a better route
2. Benoit staying on Pasta instead of anticipating a switch
3. Marner in soft point coverage instead of tightening on the non threat