You’ve been much more proscriptive, and given it a larger task than I was trying to highlight, and I can see GPT4 doing well at the kind of task I’ve personally experienced it doing well at.
What I was trying to highlight is the sort of “small task” not, very short essay and feel free to make up specific words using specific linguistics as some guidance.
I’ve seen it make up words in this way too, even without prompting it to allow it to make up a word. I was more trying to highlight that its not particularly good at prompts like “please give me a list of 50 names for a hypersonic aircraft company for my science fiction novel”, counterintuitively it requires significant additional prompt text to expand its creativity in response to prompts like this, and not repeat itself if you ask it for a list of another 50 names.