Tell me why you think that "optimization of human abilities" can be interpreted in different ways. When I think of this phrase, I first think of Dead Bone Pulse. Since I used it in the past, and because my experience using that specific ability, my interpretation will be different from yours. When I think of that phrase, I simply think of taijutsu as anything that allows you to use your actual body to fight. Now, this conflicts what you said Deviation, you said that taijutsu is basically hand-to-hand combat, now did you mean to say to think that is what you believe taijutsu is or if that is what you receive from the compiled definition. Because I made sure to not have those words in it. Taijutsu is not just hand-to-hand combat, it's basically anything that allows you to use your body, or your actual physical body. Also, I was a bit confused when you said "use your body as an extension of yourself." Your body is you. xD It's not an extension.
That aspect that taijutsu has more depth between fighters is true, like the examples you stated from the manga, and even some battles on the site. Discuss what you think your personal style is. By the way guys, this is a group training session, you can respond to each other's posts, perhaps a once or twice times, but don't just spam while I'm gone. This is more about the spread of taijutsu ideas before we focus in an overarching manner on the techs.