More dangerous towns: solution: mark towns/city's with the biome indicator as *whatever biome* (town/city) and it acts like a sub biome with increase zombies, specials and more like downtown
More zombies in the wild: solution: zombies can have a roar animation that summons a few zombies buddies to their aid. Along with spawn settings
More dangerous wildlife: solution: i would make a meat system where carnivores give you sick/contaminated meat while herbivores and bears give you good quality meat. In turn i would boost spawn in the wild and even packs of animals like wolves, also bears/wolves/coyotes/cougars will hunt herbivores and eat them making good meat less common
Deer in the day: simple! Deer and other animals during the day! Like hogs! However I would make hogs hostile at night
Sent: basicly a version of feral sense that has degrees.. and it can also lure wildlife like bears and coyotes. Along with zombies. It's feral sense but depending on what you hold.
Darker atmosphere: basically make the game darker cuz in some aspects are really bright. Especially underground. And it should be that way for base game. If you want it brighter then raise it. It should be bright by default
Old Trader supplys: each Trader you meet has a low about of supply, work with them over time and it gets better and better.
Learn by doing: basicly you complete challenges and you get little perks. You have a learned skills section in the perk tree
Learn by leveling: basicly for every 5 levels you get you get 5 skill point too level up you magazines points.
Farming on the land: basicly simply able to plant seeds on the ground like mushrooms. But crop plots gives bonus
Universal weapon perking: like the old days where you weren't stuck to set builds. Instead much like the general perks tree you have one for weapons. You can do a agility build with ars and clubs for example. However the main perks for builds are better