What bugs/issues are you noticing in Xfce that cause you to want an update? Because someone posted a question about an issue on the Xfce home site's forum and Jérôme quickly posted an update. Therefore, if you have an issue for which you have seen no update, I would tend to assume it's because no one has told him about it.
_____ Proud to be a Mint user running 64-bit Mint 17 XFCE. "Change should never be your goal but, instead, only a means to reach your goal."