Again, it depends on why you're buying the adventure. If you're here for the lore and/or to pull elements for your own homebrew (as I am), more is better. More bang for your buck, more material for your reading enjoyment. If you're just there for an easy adventure to run, a lot of that will be unnecessary to you, but what you want may lack sufficient value for the prospective lore and homebrew buyer. As a publisher you have to decide what's the bigger audience, and if you want to dedicate your energies toward that audience. And also keep in mind (and I have a lot of personal experience with this) that audience may not be you, even if it used to be.