First, it suggests that Trump's conspiracy theories about Ukraine reached a level of batshittery not previously reported on. By August, Trump had come to believe that *Joe Biden and Hillary Clinton were behind the Muller investigation.*
Trump wasn't just seeking for Ukraine to announce an investigation. He wanted to use materials from Ukraine (or whatever dubious origin) to have AG Barr launch a domestic investigation into both Biden and Clinton.
And on AT LEAST 3 occasions – July 10, Sep 1, and Sep 7 – Bolton was involved in making a paper trail to document the other quid pro quo.