Zanzibar Buck-Buck McFate said:
Look, playing around with the forward lines is fine and all but the defense is the crying need. Rielly and Gardiner are inconsistent at best and probably always will be, Zaitsev is going through a similar patch, and as a top 3 they are not going to play a shutdown game. Hainsey is OK on the bottom pairing, Polak looks done, Borgman needs seasoning. At the very least Carrick should be in for Polak. The fact of the matter is that, even when the offense is flying, Doughty is right.
The forwards are a big part of the issue with the defence, though. They're not doing their part in the defensive end well enough, they're not providing quality passing options to help them get out the zone with the puck, etc. Obviously, that's not all about the line combinations, but, there are certain groups who are worse than others, and they need to be split up and put on lines with forwards who understand the importance of defensive responsibility.
Honestly, changing the makeup of the backend isn't going to make a significant difference at this point. They're the lesser of the two evils right now - though, I agree that Polak needs to be removed from the situation. That would probably be the extent of the changes I'd make right now.