It makes sense that flowery language is more decorative than functional, but I wonder how much nuance can help shape reckoning, reasoning, and rendering -- if at all.

Maybe RFC terms are all that's needed: https://datatracker.ietf.org/doc/html/rfc2119

Flowery language is a powerful tool, but it demands more from both the reader and writer.

That’s the fundamental flaw in using simple heuristics to evaluate language, the exact same text can be useful or deeply flawed just based on the context. You need to make sacrifices the wider the intended audience.