Then you want NV. NV has a layered stat, skill, and perk system that allows you to customize your character's stats and skills and allows you to solve problems by applying those skills, even skills like Science, Medicine, and Repair can be solutions if your character has the skill.

4 mashed everything into this singular grid.

NV's layered system allows you to use different weapons based on your stats. A strong gun user could use heavier weapons like a LMG whereas a weak character can only use the smaller without penalty.

4 was just picking pistols, heavy weapons, semi-auto rifles and auto-rifles. Yes, they split up long guns by semi or automatic, and there's almost no benefit to training in multiple weapon types. So if you wanted to snipe you're using semi-auto long guns for the entire game. Honestly it's not even that good of a shooter, but it's a giant sandbox so people make excuses for it.