I also don't know who changed to logo. I know
de.ws changed it a little while ago, but I'm not sure who had it changed across the whole project. A vote is still possible, but no one's really interested in organizing it. It's a LOT of work to write up the procedure (especially since this is a submission-based vote), get everything coordinated across all the projects, that most users don't want to take on the time-consuming task. Many editors are fine with the way things currently stand. Of course, if anyone would like to take it upon themselves to organize one, that'd be fine--just realize it will take a lot of dedication if this procedure is not going to stagnate like the previous ones.