One: I know how frustrating that can be. Two: I think it's admirable that you've had a campaign that's outlived whole editions.
As for Knowledge skills, I'm eager to know how much Karma it'll take to gain more. Will you be largely stuck with your starting ones, or will it be like other editions, wherein you're only stuck with your starting ones because you're stuck between putting Karma toward "Knowing More Things" (which may give you a helpful factoid somewhere down the road, or round out characterization) or "Shooting More Things" (which brings an obvious, immediate benefit)?
"Anyway, my LOG 1 pixie wearing nothing but undergarments will know exactly as much about the blizzard that's going on as-" actually, I'll just wait it out and see what the entire Core rules are like before making worst-case examples.