I see it more that when we lost our depth to injuries, they analyzed we have better chances to maximize our regular season points with this low-scoring hockey. If you are on a playoff run, you just have to do it. If you are higher in the standings, 10 points over the playoff spot, you have leverage to not go with so strict system.
It could just take one lucky bounce in a bad game to get points. Just like those 2-1 wins (1-1 and --> overtime) against Kings and Sharks were earlier in the season.
We were ~5th in the standings after the Vancouver game. Since then there has been Zetterberg groin, Brunner hip, Franzen hip... injuries and exhaustion also nagging the top six.
I think our style could change again, if we can get some depth back for the playoffs.
Our road record has been pretty good after this change, but we have started sucking at home games with this defensive style. Can't they use them differently home and road?