I won't have a chance to look through this with any detail until later this week, but page 16 - your big d6 number layer is obscured by the secondary d6 charts. Also, any chance you can invert some of the black background pages to white w/ black text for print and play? I think a lot of people do booklet printing through adobe acrobat with standard page pdfs (not spreads) and its nice not having the backgrounds for those.
My first impression of this - it looks awesome and I can't wait to give it a playthrough.