From a purely visual standpoint, I like the Origin cards, but it would be fantastic if you repeated the origin blurb on each. Speaking as a GM who runs a lot at Cons, that would be handy for quickee character generation.
EDIT - Nevermind. I realized you'd put the pages under CC licensing, so I went ahead and redid the Origin cards,
which are here. I could see using Uncharted Worlds for a convention sci-fi horror game I'd created years ago under another system -- I'd already had homeworld and profession separated, this just continues and expands that idea.
I should port the convention scenario to UW and release it under CC licensing so that others can benefit.
EDIT2 - The way I'd use the cards is to print the Origins and Professions on differently-colored paper, cut them out, and then allow players to mix and match.