Your technique of only posing analytical questions is indeed improving the results. It's not great, but I can actually get it to somewhat reliably summarize academic articles if I give it a citation now, which is pretty neat.
It doesn't summarize them well (I gave it a couple softballs, like summarizing McIntosh's "White Privilege: Unpacking the Invisible Knapsack", which almost every undergrad student in the humanities will have written about), but the stuff that it does make up is completely innocuous and not a big deal.
Very cool, thanks again.