I got Underrail a few days ago and I have been enjoying it.
I have a couple of suggestions.
It would really be awesome if there was some sort of Hunger/Thirst/Sleepiness system. Eating food would still give the usuall buffs, but it also satiates your hunger. Different drinks would do different stuff, like a caffenated drink will increase your AP by a little, like a mini adrenaline boost. Sleep deprivation would affect your accuracy. The problem I see with my suggestion is that it can be a little bit tedious for players to keep track of, but I think would add something.
Good game so far. I cant wait to see the final product.