Hi, I didn't had enough time to polish this one out but I've tried to provide some directions and what you can correct. Maybe my edit doesn't fit game idea but points are the same.
1. In order for sword to have weight you need to give him some better motion during strong action like run
2. Because animation have low number of frames most of the frames can be considered key frames and you didn't get all important poses here. In "animator's survival kit" there's ton of useful notes on that. Generally there are frames which are strong and they define action and inbetweens which are less important but they give animation smooth and defined look. So you have mixed kind of poses here and you loose action there.
In edit poses require further refinement but they are closer to key poses.
3. You can include some horizontal motion in waist cloth along with vertical one since hips move during the run action, and also your cloth poses are the same in opposite frames for example 1 and 5, 2 and 6 etc. which makes all this a bit more stiff than it should be.
4. Regarding hair I know that you wanted to portray dreads and define them but you can do that with color instead (brighter and darker colors) and then give hair better motion since you don't have to worry about the gaps.
5. Shadows can help you in this kind of cases to better define area where legs overlap, especially in pants area.
I hope that this was helpful.
I wish you best luck with new game, previous one was quite interesting and unusual.
