the sword issue is done on purpuse. I think this is coverd on the faq for zelda on this site even. Its done to make it feel more like you have hit the enemy. now the animation, well i will look at it some more and get back to you. It would help if you had a video link that shows it clearly though.
Ok, i looked at some video, and you may have a point, but i think he is almost walking, and i think that thier will be a speed boost of some kind with a diffrent animation. The reason he looks like he isent running very much is becuse he is running without moving his arms back and fouth. Its possible this has changed, becuse in the time most of the videos have been made or captured, the controles to the game have already changed. so thats to say they still had time to get a new build of the game out and that would mean its still possible for the animation to have changed. well link runs like a fairy or elf but then again he is one, soo... i dont think its too bad.