Case I and III multiplayer ATC confuses the players, calling them all the same call sign and assigning them all the same position in the stack. In Case III only, other players must transmit 'Abort Inbound' before being able to call ATC, and then the replies are all to the incorrect player.
When a player is in case III approach, some newly joined players cannot get the crew to respond to them to get a launch or get rearmed. Must leave the server and rejoin.
Please priorities multiplayer carrier ops - it is impossible to coordinate a team with such confusion.