was thinking about how 6 players might work, and the ui is a big issue I see here. Unless they designed it from the start to be expandable (narrator: they didn't), it would be so much work to change everything. I just can't see them doing it. i can't even imagine how many systems are possibly tied to the four players either. Who knows, the toiletchain system might completely break if more players are added in. It takes a lot of extra effort to make something expandable vs static if you didn't start with that in mind.
Mods are really the only way I can see it happening