Would be cool to have some extra randomly choosen level modifiers

So i love playing the game with my friends a lot, but recently i got a problem where at least for my friend "game got a bit to repetetive" To which i somewhat agree as at later quotas don't feel that different, with monsters not being that impactfull and maps feeling same-ish with same valuables.

So i got idea what could be implemented to change that:
Stage modifers
Essencialy alongside moon-phases. in late game, each stage could get randomly choosen modifier that changes aspect of the day, here some examples, they mostly quick ideas so please don't judge entire post on just them and rather suggest some of your's in the comments!

-Fog - A thick fog will cover the ground, making it harder to see objects laying on the floor, short monsters and pits.
-Thunderstorm - A raging storm is taking place outside, rain and occassional bangs of thunder will make it harder to hear and from time to time, the light will go out in a black-out for a minute or two, making the place dark similiary to escape sequence
-Trapped - Shockwave mines, mines and beartraps will litter the floor, while opening lockers and drawers may pull a safety pin of a hidden explosive inside. Be carefull and ready to run for your life.
-Litter day - Tiny, small and medium valuables are 3 times as common compare to big ones. A break from usual late stages where your main focus would be primarily the few huge items.
-Tight security - Cameras will be placed in some rooms, acting like Oogly light which will alert a random tier 2-3 monster to your location, aswell as metal detector gates replacing some doors, which will make a lot of noise if they detect C.AR.T. or weapons, checking both for physical objects and your inventory
-A personal beef - one Tier 3 monster and few others will gain a red aura, doubling their hp and halving their respawn time after death.
-Flea market - Valuable prices will range from half of the original to double their original value. Check each item price as some once ignored items can make you a fortune, while other once priceless items may have became worthless