Game is rough as hell but super addictive, even for someone who doesn't necessarily want a huge challenge. Unless you've upgraded gear, it's always a possibility that you can lose any character within one turn from full health. The early stages of the game are all about just blowing through expendable heroes like candy, until you get your buildings upgraded and get a nice core of folks with good traits. Stuff like +5 Dodge, extra damage against humans, less stress damage in the Warren, etc. Then you inevitably lose a couple of them and have to go through the weeding process again.
I had a wonderful team of Crusader, Highwayman, Grave Robber, Houndmaster going. Everything just flowed like butter. I was even putting the Crusader in position 3 just to stress heal because the others were able to dance around and kill everything easily. Then the Highwayman hit rank 3 and wouldn't go into the starter dungeons anymore. Replaced him with a Leper but it's not quite the same, he doesn't have the same mobility. They're still doing good though, I'm not needing to rest them between dungeons and can just chain runs together.