I feel like they should release the original before the llm chewed on it.

Which part is a sin? Using LLMs to deal with a lack of English-language fluency? I am a scientist (actually a mathematician, if it matters), and, if that's the way to deal with the practical hegemony of English in the scientific literature, then I have no problem with it. Rather that than people with important ideas can't get them before the scientific community. As long as the authors personally check and stand behind the scientific content of their papers, what do I care how the exposition was produced, especially if the role of LLMs is properly disclosed?