I totally understand your reasoning, and its all up to the RC team of course :)
Im just thinking, why not release a 1.0 thats 'pretty damn good', and make a roadmap that has better skin support for say 2.0. I think it'll bring in more fresh blood as organizations may take it more seriously.
In my opinion RC is better in its current state than many 'mature' webmail clients.
But, whatever you guys prefer. I already know it's good :)
Cor
List info: http://lists.roundcube.net/dev/