Ability to invite friends to a custom server. Currently you can't invite people directly to a custom server. So if you're already in the server, the only way to get a new friend into it is to send them the server code and have them search for it. We tried inviting them to a party, but all that does is add them to the party, they still remain in the main menu lobby and don't get moved to the custom game lobby. This also wouldn't help anyway if there's more than 4 people because the max party size is 4.