I've finally got around to reading those links Ursa provided, and I have to say that the reviews in the first one rather confirmed my first thoughts. If the reviewer named Bruce has modelled his prose on the sentence-teachings of this Landon, well, something has gone awry!
And to be honest, Nik, I'm not sure how helpful it would be to you anyway. You have a very distinctive writing voice. It isn't always easy to follow, as it's very sinewy and information-rich, but attempting to "beautify" it by use of various rhetorical flourishes isn't likely to help overall, I think. If you were worried about your style, and wanted to make it a little more reader-friendly, then find an author whose style you admire and analyse what makes it enjoyable for you and then try copying it.
Here's hoping the flat spot is only a temporary plateau.