1. we had very stable multiplayer game! No problems with cross platform. Is the command grouping active by default? If yes, it looks like it works now!
Game play was smooth and really ok ( we only played 2vs2 )
2. Problems we found regarding the new headless mode:
2.1 crash for the server while the client was switching maps very fast( I think he was switching )
http://pastebin.com/Wx2dpbvK2 2. you can chat in the menu when you are the headless server. But the name that is shown is the name of the master client.
2.3. although nothing is rendered for the server he can chat ingame. ( also with the name of first client )
2.4. If a connected client ends his game the server returns to menu again. If the server was in background ( I worked in the browser )
the server suddenly starts to render in fullscreen mode again. In this moment you cannot toggle to windowed mode again, becasue all keyboard inputs are going to another process ( the browser in my case ). The mouseinput was ok.