Anything that makes upvoting/downvoting more tedious would just discourage it.
It could be implemented in a way that doesn't make it more tedious.
For example, the first click could be upvote or downvote. The vote would be counted, and it would display a list of additional icons (different lists for upvotes and downvotes). The optional second click could choose one of those icons. But even if you skip the second step, your vote still counts; the second click can only add more "flavor". If many people click the same secondary icon, it will be displayed next to the comment karma.
So before voting the icons would be like: (of course, pictures instead of words)
[upvote] [downvote]
And after clicking on "upvote", the row would change to:
[UPVOTE] [downvote] -- [interesting] [funny] [well-researched] ...
And after clicking on "downvote", the row would change to:
[upvote] [DOWNVOTE] -- [incorrect] [offensive] ...
I think one of the biggest opportunities with this would be to give more weight to votes that come with a reason. (In fact, I'd be tempted to design such a system to silently ignore votes made with no reason -- let the user make them, display them in the interface, just don't use them for anything.)
Thanks to the reaction to this article and some conversations, I'm convinced that it's worth trying to renovate and restore LW. Eliezer, Nate, and Matt Fallshaw are all on board and have empowered me as an editor to see what we can do about reshaping LW to meet what the community currently needs. This involves a combination of technical changes and social changes, which we'll try to make transparently and non-intrusively.
Technical Changes
Changes will be tracked as issues on the LW issue tracker here. Volunteer contributions very welcome and will be rewarded with karma, and if you'd like to be paid for spending a solid block of high-priority time on this get in touch with me. If you'd like to help, for now I recommend setting up a dev environment (as laid out here and here).
Some technical changes (links to the issues in the issue tracker):
--Nick_Tarleton
This is something I care about quite a bit! Ideally, the three people above would scrutinize every change and determine whether or not it's worthwhile. In practice, they're all extremely busy, and as I'm only very busy I've been deputized to handle whether or not change will be accepted. If you're unsure about a change, talk to me.
Trike still maintains the site, and so it's still a Trike dev's call when a change will make its way to production (or if it's too buggy to accept). We've got a turnaround time guarantee from Matt for any time-sensitive changes (which I imagine few changes will be).
Social Changes
The rationalist community is a different beast than it was years ago, and many people have shifted away from Less Wrong. Bringing them back needs to involve more than asking nicely, or the same problems will appear again.
Epistemic rationality will remain a core focus of LessWrong, and the sorts of confusion that you find elsewhere will continue to not fly here. But the forces that push people from Main to Discussion to Open Threads to other sites need to be explicitly counteracted.
One aspect is that just like emotion is part of rationality, informality is part of the rationalist community.
--Alicorn
Another aspect is dealing with the deepening and specializing interests of the community.
A third aspect is focusing on effective communication. One of the core determinants of professional and personal success is being able to communicate challenging topics and emotions effectively with other humans. The applications for both instrumental and epistemic rationality are clear, and explicitly seeking to cultivate this skill without losing the commitment to rationality will both make LW a more pleasant place to visit and (one hopes) allow LWers to win more in their lives. But this is a long project, whose details this paragraph is too short to contain. I don't have a current anticipated date for when I'll be ready to talk more about this.
I expect to edit this post over the coming days, and as I do, I'll make comments to highlight the changes. Thanks for reading!