Private games, this would be a rank of sorts that would let you make private lobbies. The invites to the private lobbies should be within the social menu
This tab should contain a "create private game" where you can create the game and "join private game" should be where you see your invites to the game.
Creating private game should bring up a screen where you choose what game mode you want (trios should be included too (use To4 maps for trios) and also let solos use duos maps too) and then you can choose what map you want.
Once your finished with the initial set up it would bring you to a different tab that would show the playerlist (click on it to bring the whole thing up) which you should be able to do the same actions as you usually would in a party and maybe even set teams up too. You should also be able to redo the initial setup when you want to change map or gamemode
This tab should contain a "create private game" where you can create the game and "join private game" should be where you see your invites to the game.
Creating private game should bring up a screen where you choose what game mode you want (trios should be included too (use To4 maps for trios) and also let solos use duos maps too) and then you can choose what map you want.
Once your finished with the initial set up it would bring you to a different tab that would show the playerlist (click on it to bring the whole thing up) which you should be able to do the same actions as you usually would in a party and maybe even set teams up too. You should also be able to redo the initial setup when you want to change map or gamemode