Don't forget, SAG rules are rather specific as to who gets credit for what, especially with regards to that "Created by.." credit (enough that David Gerrold thought it worth suing Roddenberry over TNG), and Andromeda does have that "Created by Gene Roddenberry" tag on it, with RHW getting the "Developed by" credit.
"Created by" credit is given to the person whose work originated the project, even if later development changes it into something entirely different. Similarly to how Dave Mack and John Ordover got "Story by" credit for DS9's "It's Only a Paper Moon" even though the final episode had almost nothing in common with the premise they actually sold. But their premise started the chain of associations that led to the idea for that episode, so they got credited -- i.e. compensated -- for their role in bringing the story about. Remember, credits aren't really about who did what, they're about who got paid what.
In this case, it's a little more direct than that. What earns Roddenberry the creator credit is that the basic framework of the concept and the name of the main character -- Dylan Hunt wakes from suspended animation to find his civilization has fallen and sets out to restore it -- was clearly and directly derived from GR's
Genesis II. No one could reasonably argue that the show was not recognizably based on GR's creation, therefore he deserved creator credit -- no matter how much or how little of the final work was based on his ideas.
And the "Developed by" credit is used for any show that's derived from a separate work. It doesn't mean the person getting that credit did less work than someone else, it just means they took something that was in one form and developed it for another form. Case in point: the TV series
The Middleman was credited "Developed for television by Javier Grillo-Marxuach," because it was adapted from a comic book created by... Javier Grillo-Marxuach. Not only that, but the comic book was based on a TV pilot script by Grillo-Marxuach, a script that was ultimately filmed as the pilot episode of the series. So even though it was entirely JG-M's creation, he got a "Developed by" credit rather than a "Created by" credit because the concept had previously been published as a comic book.
Or look at the current
Human Target series. Jonathan E. Steinberg gets a "Developed for television" credit for that because it's based on a comic book character created by Len Wein and Carmine Infantino -- but this incarnation of the show bears virtually no resemblance to Wein and Infantino's character. Basically the only points of commonality are the title and the main character's name; in every other respect it's a completely unrelated show. But Steinberg still gets a developer credit rather than a creator credit because the project is based, however tenuously, on a separate, pre-existing project.
So the fact that someone gets a "Developed by" credit doesn't mean they did a minority of the creative work. It just means that the project originated in some other form.
The process by which
Andromeda was developed has been well-documented online and in Jill Sherwin's book. It's easy enough to verify that most of the ideas and characters in the final product didn't come from Roddenberry.
