I understand what you mean about the movement and having the feet planted. Your edit made him look like he strikes with way more power now. I think I was just trying to make it as smooth as possible and have as many frames as possible. Having less frames definitely gives his swing more force. Thanks for the tips and advice I will probably take your edit clean it up and use that thanks again
It's in bad taste to take an edit someone made for you and edit it back and use it for your own purposes. The intention of edits on this forum are to help you improve, not to make your assets better. You are permitted to take the ideas, but not the actual work that wzl did for you, excluding the rare case the editor grants you permission, however this is rarely the case, as they would not have made an edit if they weren't hoping you would learn something.
As an aside, animating things with more frames (given a consistent framerate) in between two points slows it down, as it is distance/time, or velocity. If you want a smooth strike without sacrificing power or bumping up the framerate, you can use the frames to either side of the slash frame itself on the timeline to telegraph a smooth feeling. Especially follow through can help with this.