The sword fighting wasn't bad, but there were areas of improvement. The swing's of the swords and axes could have been sped up with less frames. A pause when the weapons collide is a good idea. Also, the movements themselves could have been emphasised. Having a large swing looks more realistic than slight sword movements. This is due to the sword having much weight, making the smaller swings a difficult task to perform, especially in combat when the fighter wants to have the most impact possible.

As for the walking, the walk cycle was good. I think you should try just focus on removing the jitters the character had. I noticed they would jitter side to side every few frames.

I hope I was able to help.

I mean that there should, on most occasions, be a smooth walk cycle, with each movement flowing to the next. This is mimicking real life, where your arms swing forwards and backwards as you walk. In your animation, certain frames had a jitter. For example,  the minifigure would be walking forwards. If he sways to one side, it would be distracting to see the minifigure, mid-sway, jolt or jitter in the opposite direction just for one frame, and then continue with his sway. This is usually created by a small bump when animating.