Bah. Not a success? Are you guys serious? Just rename "Kubuntu" to "Ubuntu" and the current "Ubuntu" to "Gubuntu". Wanna bet it will be a success then?
Of course Kubuntu couldn't be a success. It was a second-class citizen to begin with. The name itself suggests that to whoever looks at it. If Canonical really wanted it to succeed, they wouldn't have put it in the corner, on another domain with another name and thus making it look like some inferior spin-off product rather than the real thing.
You're responsible for killing it (meaning Canonical, not you personally.)