Robert Charlton:
Now, in complete disregard for what I just said, I'd like to talk a bit about the logo. This is, I think, the most important part of our project's presentation. Once the style guide is finished, it should be one of the first things to (re-)design.
I'd like to quote: http://www.businessweek.com/articles/2014-01-23/tor-anonymity-software-vs-do...
In photographs he’s often with his laptop, and on the cover of his computer, a sticker shows a purple and white onion: the “o” in the word “Tor.”
The current Tor logo has years and years of recognition. It's the only thing close to a “brand” that Tor currently has. Changing it drastically is going to be a really costly move. I am really not convinced that it's worthwhile