Not sure what your comment means, but using a shorter cue would mean your giving up shots that may become out of your reach using a standard or longer cue, unless you use a bridge.
Personally, I prefer a longer cue and/or an extention. Some people have mastered the bridge, I am not one of them.
i'm not the tallest guy in the world and i just got used to shooting with the bridge. like most short players she'll get used to it and won't really be giving up any shots because of the cue's length