We at The Keep Studios are close to publishing our first 3PP module, and we've been looking around to see if anyone had advice on editing. There are two things in the Style Guide that have us scratching our heads.
First, Un-dead: We think the intent here is that players should not take undead creatures for granted, but should actually think about their state. However, "un" is not a word. So hyphenating really doesn't make sense, and feels wrong next to the unhyphenated spellburn, spellcaster etc.
Also, google's spellcheck is awful, and doesn't recognize unhyphenated as a word.

Second, "pick a gender and stick with it". Initial reaction: Yes! I'm sick of political-correctness interfering with the flow of writing. After trying to do it: Crap, how do I know how often or whether or not to switch between male and female? How often do you guys change it up? Do you stick to one gender for an entire spell? For an entire chapter? For an entire book?
Thanks for your time, this is a fun game to play, and even more fun to create content for.