Get the darkness falls mod, currently it has a stable ver for 17.4, and the mod creator is working on a a18 version already. It has no stats, weapon use and weapon based perks are based on action skills that you raise by using the weapon, or mining tools, or armor etc. It also has a class system with the player being able to scrap skill books they don't need for skill notes, that they can use to craft other class books, or even into a book that grants a generic skill point you can use on anything. In the end the player can get all classes, it also has 2 more tiers of gear, coil guns, then sci-fi laser stuff. and Titanium tools/weapons/armor as well. Also has triple the spawn rate of vanilla a17, and has a ton of new zombies with special abilitys etc.
Its honestly what I feel the game should be. I pretty much droped vanilla a17 once I found the mod because it was just a far better experence than how limited a17 vanilla was. Will probally do the same once it drops for A18.