The key thing I noted about the game is that it didn't really feel like a Roguelike. It is essentially Russian Roulette with some chair/inventory swapping. I'm not sure you can really change that now either. There could be some randomized events though. Maybe have events happen which force things to happen during a round -
'Give up seats to the Elderly' - Wise must sit down.
'Wear a Mask' - Prevents infection from spreading.
'Police Activity' - Psychos who kill are immediately caught.
'Undead Invasion' - Fills all available slots with Undead.
etc