I like the way you think. But it is hard to make something like that without confusing the everloving **** out of new readers.
You think there's any way to keep connectivity like that alive while still making sense? Without those annoying "see issue #35 of %$#@! comic" notes, I mean. Hidalgo, Chee, and Wallace have tried to tie a lot together through Guidebooks, but they're not really stories in and of themselves.
That's a good thought. I think in Canon there's just too much pressure from the companies to pump out new material, so that's keeping the authors' love of other stories and desire to expand them/include them in their own at a low.
I don't know if a movie could really be slow or long enough to do the EU justice while still being an entertaining Star Wars movie, but I would love to see something of the sort you describe. In fact, I think it's exactly what the NuCanon EU needs right now.