Board Thread:TV Show Discussion/@comment-74.71.241.53-20150625040137/@comment-3968559-20150625155550

First she is like "Yes, your grace, we will conquer Winterfell. Then the general comes and tells Stannis that half of his men deserted (Where, exactly?) and she leaves.

As TDD said, lazy writing. They could've easily just left her at the Wall with Selyse and Shireen and burn her next season. To me it seems that they wanted to get rid of everything Stannis (except her aand Davos) as quickly as possible.