The biggest issue with the body text that I encountered was that it felt like I was reading one long sidebar, if that makes sense. The text size for the body text is just big enough that it reads as "side content to the body text" to me, and the combo of the body text size with the column size left me feeling like I was stitching together sentence fragments into one whole sentence vs. just reading a sentence. There are some images in the columned text that feel like they would be better in a larger size and breaking the column format, such as some of the more intricate images on page 5. I find that columns are usually a helpful formatting for when you have lots of little bits of information to put into one section that would otherwise take up a lot of page length, or for lots of body text that is in very small text like an academic paper. It was much easier for me to read and retain the sections of rules and setting that were formatted without columns and gave the images room to shine.
You actually have some really good formatting on your character sheets; you use column, tables, and blank fields effectively against the ornate borders and images you've chosen. If I'm looking at the document just through formatting alone, that looks like where you hit your stride. The spots that are not in columns feel like you've given them room to breathe and shown off your creativity. Your lovely text needs room to breathe so it can dance with your images! There were plenty of pages that wowed me, so I think you'll just get better with practice.