Training live blades always changes your mindset, just look at how defensive and uptight people got with their replies. In a real situation what kind of mindset will you perform better with. You see a real blade and say to yourself ok its party time, or you can be oh my god its a real blade. Im not saying to do mindless drills over and over, but you need to be able to swing a large blade just like it is a stick. If you can't you are more than likely going to cut yourself at a time when you can't stop and get a bandaid. As my teacher says "if it matters what the other person is trying to do to you, you are probably going to die." You have to stay loose, and you can't predict for one second what your enemy is going to do or what kind of weapon they might use. So make your training reflect that type of mindset.