I was a supporter of the original KS, so I can't comment on the new boxed version of the KS extras, but I can say we love the extra characters and the Shadow henchman. We don't always use the travel die, as we prefer the predictability of moving 2-3 spaces per turn.
The new box of stuff is pretty much just the original promos from both the other campaigns with one new Henchman.
While I like the new Henchman a lot, I was not quite as happy to spend as much as I did to get repeats of everything else.
No huge thing, since I am sure I will be able to unload these extras eventually. :)