Get rid of cancellation of rep gain or rep loss based on question (not answer) up/down votes made after a question is marked Community Wiki.
When a question is marked Community Wiki, no more reputation is gained on either the question or the answer. This is a side effect, not the purpose, of Community Wiki.
I can see a rationale for no additional reputation for Community Wiki answers. Maybe the fastest gun started the nucleus of a good Community Wiki answer, but was only responsible for 10% of it, and shouldn't get 100% of the reputation. Answers can be designed by committee because they're made up of facts, and we should be able to agree on facts.
However, I'm not so sure of the rationale for no additional reputation for Community Wiki questions nowadays. I don't think that questions can be designed by committee. The FAQ says questions are "based on actual problems that you face", and you're the one who has the problem. Other people can help phrase your question better, or they can answer it, but they can't ask it for you.
If Community Wiki doesn't make your question higher quality than it would be under non-CW mode, then you've "earned" your question upvote reputation as much as usual, right?
I could be mistaken though. Maybe there's data that marking a question as Community Wiki increases the amount of editing by low-rep users, even if they could suggest edits otherwise. Or that it encourages people who could, but choose not to, edit a question to do so, or edit it more thoroughly.
Just in case someone argues "But what about 'favorite cartoon' questions? Why should someone get reputation for that?", I interpret Grace Note as saying that Community Wiki is no longer (if it was ever) the correct hammer to deal with such questions.