Good analysis. This and the previous game, Kadri and Mangiapane seem to get crossed up on who covers who.
Perhaps this is a function of playing with different style players.
Last year, Mange was at his best playing with Backlund, who always knows where his man is.
That took pressure of Mange to focus on one guy and let Backlund tell him of any switch.
Who knows.
It's concerning, when we get in this situation, but there is some other things going on that lead to it.
Seeing too many risky entries where the pass across is too shallow.
Puck hits a skate or deflected by a stick and the other team is off to the races.
Seems to happen a lot 5v5.
Mostly from the top 6.
You mentioned the 4th line getting a lot of minutes, which is also concerning.
They are good at one thing, forechecking.
When the play is in our zone, it's an entire shift of not getting it out.
Some good pressure on the other team, but failure to make a simple exit.
As well, you can't really ask them to score goals much.
Best you can hope for is wearing down the other team on a shift.
And allow next up to build on it.