This board is the place for the community (and developers) to discuss the specifics of the Warfare mission. Feedback on the mission, discussion of current features or new features, exchange of your own modifications of the mission, and support on Warfare-specific design and scripting issues can all be posted here.
More info on the thought behind the "semi Open Source" development of Warfare can be found on the Developer's Blog: Open Source Warfare
If you're interested in modifying the Warfare mission, your first stop should be the Warfare Editing Guide on the BIS Wiki, giving a step-by-step introduction to how and where specific mission features can be changed. Do not hestitate to share your work here on the forums. Everyone is welcome to contribute to the future shape of Warfare!