The Powers That Be at Lucasarts seem to be caught between a rock and a hard place; I recall reading somewhere that novels featuring the Big Three as major protagonists sell substantially better than novels that don't. This has resulted in Luke, Han and Leia having to save the galaxy again and again. Yet those characters are inevitably aging in the novel line, and the publishers must be aware that at some point, they'll have to let the Three settle down for good, or at least let other characters take center stage.
Or, given some of Luca$'s tendencies, maybe we'll get a 100 year-old, greying, balding Han piloting the Falcon with spotted hands, but even so displaying the same skill and spirit he had in the days of the Civil War.
I agree that the Vong felt, well, unlike Star Wars. I can understand the new publisher (Del Rey, I think) wanting to move past the "Imperial warlord of the week" pattern established by the previous one (Bantam?), and to shake things up. So they came up with the idea of a new major war. Unfortunately, I never managed to accept the Vong and their arsenal as plausible. Completely biological technology advantageously comparing to hyperdrive, lasers, starfighters, capital ships, etc.? It was too much.
The Legacy of Force series wasn't too bad at first, but the last two books were IMO really bad and have mostly turned me off the novel line, at least in this particular era. The fact that the latest Fate of the Jedi novel apparently only has 236 pages of writing at full hardcover price does nothing to improve my opinion
Oh, and I agree that it's a bit silly to use spoilers for a series of novel that ended a half-dozen years ago. Should we keep from mentioning spoilers from Lord of the Rings as well?
Two last but important notes: first, if you like Aaron Allston, you might want to read this:
aaron_allston: Orange Juice, Laxatives, and Near Death Experiences
And if you like the Legacy and/or Republic comics, its author John Ostrander is in similar straits:
TheForce.Net - Latest News - John Ostrander Benefit Auction