Animations are silky smooth which hugely adds to the overall feel and quality. It's actually rarer than you think for 2d rpgs to have full-on battle animations, heck, even idle animations are scarce. So props for that, it really makes your game stand out.
The art, however, is in desperate need of shading and highlights. While the some of the lines and shapes are a bit rough and in need of redrawing/anti-aliasing, they'd be passable if you implemented proper lighting for each sprite. And I really mean it, the difference would be night and day, it would be crazy not to do it.
I'm not sure if you guys were planning on adding shading/highlights later on, or if you're not sure how to go about it. If you're not sure, you can send me a static sprite of any character/enemy in a pm, and I can add shading/highlights as an example for you.