We've seen that Alice has the power to do...something where she can move about unseen while everyone and everything else appears frozen. Although it's not clear what this power is, it could be a burst of extreme speed, since her hair is always blowing around. In this state, she appears to be able to interact with other objects, since, for instance, she was able to flip someone's phone around in midair.
However, whenever we've seen her in combat, she has used her telekinetic or mind-control powers, which although quite powerful seem much more limited. Further, we have only seen her use her time-stop or speed power for reconnaissance. What, if anything, prevents Alice from employing this power in a more aggressive manner in actual combat?