This game needs offline co-op mode.
Offline co-op mode= 2-4 controllers on Ps4.
Minecraft offers 4 controllers.
Ark offers 2 controllers.
(hint why I want NPC allies for this reason as well)
The second player or all other 3 players makes exiles. Basically a party on your own system. Or at lease a second player.
Remember this idea for Offline single player.
Players can jump in and out at will without messing up Offline single player mode.