The reduction of lines in ANC in the immediate future has a lot more to do with SEA crews being ETOPS trained and ANC losing a lot of its Hawaii flying to SEA.
As for QX flying Arctic & SE, that will probably happen in the coming years. The again, I'm speculating here. ALK is supposed to get rid of all its 737-400s by the end of 2015. So, I can see QX flying PAX in the Arctic and ALK converting some of its 737-700s to freighters only.
Again, this is all just speculation on my part.