By rearranging the sequence of events, they are now theoretically escaping by jumping into a snow drift that should no longer be there. That's why it's a writing issue.
It's hard to imagine what they were thinking.
They ended a mediocre season -- complete with the rape of an underage character, threats of pedophilia, and child burnings (only in the last few episodes) -- with a fan favorite character dying. It's not like the Red Wedding at all. That was the biggest gut punch of that season. This comes only two episodes after watching a man murder his own daughter. You can't just make disasters occur right on top of each other like an endless procession of misery and expect the audience to bounce back over and over, especially if the quality of the writing doesn't support that much pain.
You just can't structure a TV season that way and not expect it to result in emotional exhaustion for viewers, especially when you haven't given them canon reasons to hope.