No one is still clinging to her roots as Arya Stark. The whole situation is epitomised by the fact that she can't let go of her beloved Needle, the one item that defines the youngest Stark girl. So long as the sword remains, so too shall Arya, and there's every chance we could address that issue in Season 6. Arya could soon face an enormous crossroads. She could be given the choice to rid herself of the sword and truly become no one, or she could grip her old companion by the handle and pierce her way back to Westeros. Of course, neither of those things could happen, but there's definitely some significance in the hidden Needle, otherwise it would be sea-bed fodder by now.