Flesh out the world! Give the scenery some love! Put some meat on those worldbuilding bones! Build in some complex history, not just the plot-relevant stuff! Hey, why is your book so long?
Welcome to my hell! SF/F gets a little bit of leeway when it comes to higher word count caps, but even with that, I’m definitely struggling to balance natural storytelling, two major plots, dialogue that has room to breathe, and an entirely invented alien culture with layered mythology and complex history.
Comic features my mother, who used to always say this useless crap about why she thought my word counts were high. (I do not have an overdescription problem. The opposite, really.)