Like the Nasat, I'm a continuity junky; the then-nascent Expanded Universe is what got me hooked on Star Wars when I was a child, not the movies themselves (I never cared much for Jedi; I was more interested in the smugglers and fighter pilots

).
I've always felt that having a strong and diverse canon
helps storytelling --a writer doesn't need to describe something because he/she can trust that the audience knows it (in all the Star Wars novels I've read, the
Millennium Falcon is only actually
described a couple of times --usually it's just "a Corellian light freighter" or "horseshoe-shaped").
And yes, different authors doing different things is part of it.
Part of what I grew to love about Star Wars (and post-Crisis DC, and Trek) was how the fans themselves were invited into the story to try to reconcile the apparent contradictions (caused by Writer B not having read Writer A's book). This only served to add new details into the ever-evolving tapestry --which spawned more errors, and resulted in more "patches" growing over them. It's like a vast, organic, ongoing work of collective art.
Just last month, The Clone Wars did a 3-episode Mandalore arc that, I gather, invalidated a whole multi-book series of popular Star Wars novels by an author named Karen Traviss.
And even here the fans are already vaulting into action:
Traviss' (far superior, IMHO, and I say that as someone who loves
The Clone Wars) novels openly admit that Mandalorian government isn't
like anyone else's --it's not unbelievable that Satine might have set up a "front" government to interact with the other interstellar powers.
Shab, at that point they didn't even really
have a proper Mandalore --Jango Fett died on Geonosis and Fenn Shysa was still trying to consolidate a power base. (Which itself would cause problems: the thought of a nation simply not having a head of state and
not particularly caring would be incomprehensible to the Republic
and the Seps.)
Traviss' novels are also seen (pretty myopically) through the filter of Kal Skirata (and his children/associates, who inevitably share his viewpoint), who freely admits that he's not like most other Mando, and who has a fairly low opinion of many other
Mando'ade (and thus may not be entirely reliable as a viewpoint character). And Kal'buir's family was actively trying to avoid Jedi attention, so there's no reason for Obi-Wan or Anakin to know about them.