I know crew is going to hate me for this but judging by the amount of opportunity people will have to just stomp into any game they want and absolutely decimate anyone's suspension of disbelief... we might HAVE to move to locked servers. In A-10C you really limit your audience and don't get too many idiots- but now that we have this ground arcade format game developing in tandem... it really opens the door.
Umm, I don't think there is a problem - as long as multiplayer mission designers leave out the Game Master slots. As the manual recommended - leave the Game Master to Single Player missions.
That leaves Ground Force Commander slots and JTAC slots, which are separated by Red and Blue sides. The Force Commander slots can do strategic control while the JTACs can only do vehicle control.
For multiplayer, leaving out the Game Master, limiting Map Views to Allied (like we do now) or trying Fog Of War, and using Servman to monitor for tks, I think all will be OK.
So if you join a multiplayer server and see a Game Master slot listed, know that a Red player can get into a Blue vehicle and vis-a-versa.
I made a quick mission for yesterday's CA fest effort and put some Su-25Ts in it. They were only available for the Russian side so they ended up being Red against all of us Blue players. If you want to pair Su-25Ts with Blue then you will need to include Russia with the Blue countries in the Blue Coalition.
Once you create a mission you can't switch the Coalition members.