Attack animations (like the swing animations) could really use a lot more oomph. Generally the way to do that is: Optional draw back, hold, super fast swing, (and optional final movement). Using fewer frames will make it feel more powerful. Doing this can still have the exact same total speed as what you have now, while feeling a lot more powerful.
Further reading:
http://www.gamasutra.com/view/feature/2290/improvi...
(Also, ditto on the projectile visiblity comment Yomic made)