something even co-created by Jordan Weissman is far more cannon for me, than aynthing what we can see now 
Even back in the day, Jordan was not that involved in the actual writing of Shadowrun. He came up with the original idea, but the actual world and plot development was mostly done by other people (Tom Dowd, Bob Charette, etc.)
And we don't know how involved he will be with future Shadowrun Returns products. I have the impression he didn't have much to dp with Dragonfall (since he was busy with Golem Arcana).
In any case, doing your homework and being mindful of what others have contributed to the setting you're using is basic respect IMO.
But again, maybe I worry for nothing. Time will tell.
