@sam-pinansky
Yeah, JC Staff's Orphen anime was pretty much original content from the start since they only loosely based the entire first season around the first volume, while mildly adapting elements of the second and fourth volumes. Otherwise, they virtually ignored all of the other arcs in the main series, along with a majority of the lore, plot and characters and basically made up their own story. As for Akita Yoshinobu, he didn't fall into a creative slump and left the main series incomplete for years. That old rumor was based on him first talking about making the Teshitahen sequel starring Orphen and Cleao's daughters and Mayor(sp?) on his personal website, so you got people crowing "Orphen isn't finished!" when the main story was done years ago.
As for the re-edits, he condensed the main series into an omnibus, going from the initial 20 paperback volumes into 10. He's also done the same for the prequel gaiden and sequel series for Orphen. He's now re-editing the Muhouhen compilation again into two book series: Pre-Journey and Rogue (Pre-Journey covers Orphen's time as a student while Rogue details his travels before the events of Volume 1).