i don't think anything in my laundry list qualifies as "big", aside from maybe POV switch where I could replace the main text box with a full dialogue system and we can talk about her in 3rd person.
I can also maybe do something more interesting with the currently-infinite food button, like tying your food stock to a minigame. i don't want it to consume either IRL or in-game time though, maybe just a clicker game running in the background