The reasons are thats its a lot of work and difficult to define.
Yes a coordinated effort might solve it (if thats not stating the obvious I don't know what is ;o)
What I meant was, what are you contributing? Whats your suggestions? Are you prepared to do some of the work,if so how much? Can you resolve the design/definition issues?
I think everyone's agreed we'd like/need a new one. So lets not waste time just debating this again.
If your not putting a new offer of effort/resources on the table, then there's nothing to discuss.