1) already fixed (will upload soon)
2) it would be useful. even better if you just list keys you changed so I can change them in default conf and also change them in existing config file (postinst script will do that).
3) I'll look into it
4) imho homeworld's source is not available. Let me know when you find it somwhere.
btw what about external keyboard/mouse? they doesn't work in games at all?