Why is the running script not traditional? That's a good question because many simplified characters were formed after the writing methods of running script and cursive script were opened. For example, our common words such as Bian, Wei, Dong, Yao and Shi are all like this.
Wang Xizhi's copybooks are basically simplified characters? I didn't know you were referring to his copybook. As far as I can see, Lanting preface, Huang Tingjing, Seventeen posts, etc. It seems that there is nothing like what you said. Maybe you mean that not all the popular simplified characters have traditional characters, so you seem to be simplified characters all over. But the whole article has no traditional Chinese characters, as if it really doesn't.