User blog comment:TonywongWYK/Patch Ideas/@comment-5514182-20130825214115/@comment-10958553-20130826044238

What if popping a spell shied gives her movement speed and removes all existing slow effects? I think that would have better reward for catching a nid spear, and if you were being locked down (by nasus or something) you would just block the next thing AND RUN LIKE HELL.

If that change was made and the mana return removed, we could actually lower the mana costs of her other abilities, but until then, no.