By the way, an alternative explanation for the fact that so many developers are here but so few (or none) actually contribute to LW code, is that they're busy making lots of money or working on other things they find exciting. This is good news for you, because making the changes may be easier than I originally estimated. As long as you are determined enough.
I think a core reason is intransparency of how to contribute changes. You don't know who you have to convince to chance something so most people don't even try.
I think it'd be a good idea to keep a list of the ways we'd like to see LessWrong improve, sorted by popularity. Ie. email alerts for new responses.
So if you have an idea for how LessWrong could be better, post it in the comments. As people up/downvote, we'll get a sense for what the consensus opinions are.
I think there's a pretty good amount to be gained by improving LessWrong.
Note: I say "ways to improve" instead of "features" because "ways to improve" is more general.