Well, this passage:
There are a couple of exceptions to this rule: the Jeri Taylor penned novels "Mosaic" and "Pathways." Many of the events in these two novels feature background details of the main Star Trek: Voyager characters.
From your Canon wars article (interesting read, as ever), to me seem more to indicate that the events that are background information are Canon, not the novels themselves...
And we have two references from the live DS9 show that match the Star Trek online Map...
The 200LY distance from DS9 to K7, which, on the ST online map, is of similar distance to Earth - Bajor...
Plus the 150LY Romulan border when in ENT they encountered Romulans 130 LY from Earth does indeed heavily infer the map is valid (if not Canon)...
Since these quotes come from the show and match events derived directly from the show, I tend to believe them more...
The distance from DS9 to Earth has several pieces of conflicting canon information. Some that indicate ~4,000 light-years and one for several hundred light years.
Again, read my statements above...
I'm not sure the entire books are Canon, and more than one element matches what is said onscreen to the Map...
But in the Sullust-Endor distance there is noting to contradict it, where as in the DS9-Earth distance there is information that indicates quite firmly to the contrary.
Well, lower Canon does...
Look, as far as the Sullust-Endor thing is concerned, I believe in the shorter distance, I don't believe in a 120 000 LY SW Galaxy, but I don't believe in the Jeri Taylor novel distances...
And even if the distance for Chacotay's home planet was correct, who says his homeplanet is on the border closest to Earth, and not the one on the lower left portion of the map?