"Her chakra was still quite weak compared to hers" I guess 'hers' part should be 'his'? :)
It left me a little bit puzzled that Sasuke could sense Kakashi's presense, but Sakura couldn't. I mean, she should have a lot of spiritual energy (since she is a woman) and I understood she is good at genjutsu. So it was a bit suprising she couldn't sense him.

I liked the philosophical part! I never quite understood why no one in Naruto-series seemed to actually stop and think that they are killing people all the time. But then again they are raised to kill, so maybe that's why...