so basically im having this some sort of wish to play Cataclysm in a similar way like open world RPG game, where killing zombies, crafting stuff and completing quest grant you XP and when you level up your skill (mainly stats) will increase by random choice.
Stats through Skills or Stats through Kills if what you’re looking for. Though I don’t recommend the latter, you get really broken really fast. Same with Stats through Skills, but it’s more balanced and soft-capped.