A general failing of HPMOR and most 'rational' fiction is they suffer from the same plot railroading. Instead of starting with a world rules, characters, problem, and unbiased evaluation of what happens they generally try and fast talk their way into some predefined plot.
In the short term this can work, but for longer plots you still need to whack ever increasing numbers of people with the stupid stick or backtrack and edit in a few plot relevant items at the beginning ex: The Martian.
A general failing of HPMOR and most 'rational' fiction is they suffer from the same plot railroading. Instead of starting with a world rules, characters, problem, and unbiased evaluation of what happens they generally try and fast talk their way into some predefined plot.
In the short term this can work, but for longer plots you still need to whack ever increasing numbers of people with the stupid stick or backtrack and edit in a few plot relevant items at the beginning ex: The Martian.