You missed Marner.
But to me it's not unbelievable, it's been going on for ages without correction. By game 90 the players should know what is expected of them with regard to those types of turnovers and general Dzone safety. A really good coach corrects these things throughout the season, by either teaching or disciplining.
A stupid change in Game 5 led to losing the CBJ series
Dermott's ridiculous Dzone play led to losing Game 6 (and the series) against MTL
Kerfoot's awful drop pass led to a loss in Game 6 (and the series) against TBL
Last night Nylander, Marner and Matthews each cough up the puck at the blueline costing us the game
And it happens all the time. It would have been the reason we lost to TBL last series if not for some good fortune.
Why does it continue? Because it is not properly corrected all season long.