Party member count mod, does it exist?

[Tilarta]

It seems such a waste to only have 2 party members (not including Cloud).
So is there a mod that can enable 1 more party member?
https://steamcommunity.com/sharedfiles/filedetails/?id=3248653110
I made this concept art to show what I would prefer to be able to do ingame,

[Daenoxiis]

Not that I know of, but there IS an in-battle PHS mod which allows you to switch your party members in battle like in Final Fantasy X.