I too am hoping in time more challenging elements get added to make the game difficult for experienced players. Roaming zombie hordes, NPC survivor gangs and raiders, and whatever else is planned down the road.
Cranking up the zombie spawn could help, or tuning down loot would help more … but really, if you know what you’re doing, you can become nearly indestructible a lot easier in this rogue-like than in others because the difficulty doesn’t ramp up as much as in games where you go down a floor and the monsters are automatically harder.
Its always tough to balance games for different play-styles and audiences. I’d much rather the game be challenging (or damn-near brutal to new players) as its default setting, with a “Newbie Mode” Tutorial for new players to quickly learn the ropes because I most enjoy and am used to difficult rogue-likes, or at least a well labeled “for experienced players” option that automatically cranks the difficulty up.
Right now it can feel like, if I can survive the 100 meter dash to makeshift-crowbar-open the first suburban home and survive my crack addiction (playing Prostitute for the added difficulty early on), the game is pretty much over. Food hasn’t ever been a problem for me after day 1. Books are easy to find and jack my skills up to workable levels. With tailoring and a bunch of scraps I can outfit myself with [reinforced] well fitting items for every slot that let me go, smartly, toe-to-toe with zombie groups without a scratch. That can all be done in a couple hours play-time. If you get lucky and find some of the aforementioned uber-guns or just a massive stockpile in a basement you’re godlike even earlier.
Hell, I played a “no bionics, no mutations, if I get a bite that infects me I consider myself doomed & quit immediately” game and I made it through winter, had an armored RV-of-doom, and was clearing more difficult content for artifacts when I grew sleepy from not feeling challenged.
As for the “other people would be looting/trying to survive”, the game-lore says its been just a few days, hasn’t it? Without NPCs working correctly (so there’d be roaming looters or bands of survivors, and/or Walking-Dead style towns fortified and full of jerks) it is hard to accurately show that looting going on, or explain where everything went that was looted.
I think having a lot of the better items be in disrepair and scarce would be an improvement. I can’t really foresee how there are so many firearm stocked basements out there (and sometimes they’re stocked enough to make the military outposts look ransacked and sparse). The game world can feel kind of “where did everyone go”, was there a Rapture? Almost like its preserved in pristine condition, barring the vehicles being beat up. Homes are all locked and windows intact. Stores don’t seem looted (which is what would really happen the INSTANT something like this went down). There aren’t signs of other survivors having made a last-stand … no boarded up homes, etc.