Yup, I'm going to upgrade. After a little while when most of the glaring bugs will be ironed out of course. I find that's the best approach to living on the bleeding edge.
I really haven't found any glaring bugs yet. At least on desktop. On server, you should really just stick to LTS -- rarely is your system's value add how fresh your libc is.
How's the systemd move? Is the conversion from upstart reasonably feasible?
I've actually been using upstart a bit as a sysadmin. It is the sort of thing that is clearly The Right Answer compared to init scripts.