Do we think the 10:1 ration between top-level main posts and discussion posts/comments accurately represents the differing value of those contributions? The question matters more the more value we give to karma.
Maybe it doesn't accurately represent the differing value (for instance, I think of discussion as anywhere from 1/5th to 1/3rd of main), but the downvotes being worth 10 as well is critical - it keeps less-approved of things well off the front page, which is important for newcomers.
Currently, LWers get +1 karma for a comment upvote, and +10 karma for a main post upvote. But clearly, there are other valuable things LWers could do for the community besides writing comments and posts. Writing isn't everyone's forte. Why not award karma for doing productive non-writing things? It's probably not optimal that karma and the community status that comes with it are awarded only for the thing that myself and a few other people are good at. For example, I really wish LW could award karma to programmers for improving LW.
The challenge is doing it fairly, in a way that doesn't alienate too many people. But there might be a workable way to do this, so let's explore.
Perhaps tasks could be assigned karma award amounts by LW editors (Nesov, Eliezer, Louie, etc.), or even just one person who is appointed as the Karma Genie.
Examples: