I remain to be convinced that the tasks you propose an LLM could do contribute any more to the process of writing a paper than dictating to a typist could do in the 1950's. It's impressive for a machine, but not particularly productivity-boosting. Tedious tasks such as correctly formatting references belong to the copy-editing stage (i.e. very last stage of writing a paper), where indeed I have seen journals adopt "AI" approaches. But these processes are not a bottleneck in the scientist's workflow.
I certainly don't think the performance of LLMs that I'm familiar with would be any use at all in compiling the original data into scientifically accurate figures and text, and providing meaningful interpretations. Most likely they would simply throw out random "hallucinations" in grammatically correct prose.