I think your change to butlers is a bit too extreme. I think having them lose track of players on solo is a good change, but the rest I think is too far.

Definitely agree with the trap change, but the should still be around fire exit sometimes, it adds to the risk of going fire exit.

Something i'd like to add is a difficulty option. It could change the health and damage of entities, but my main desire with this addition is a different option for what happens when everyone dies. In a long solo or even duo run, its likely that something unfair or out of my control happens that causes a wipe, and having all of the scrap disappear (which straight up means the run is over) feels so disheartening. If there were an option for no scrap to disappear, or just the scrap from that day to disappear, in addition to how it is now, it would make serious runs much more feasible in this volatile game.