I mean you no harm
no room for Stat-Based or Overall skill Levels?It already is. Your proficiency in weapons IS your skill with them.
What is wrong IMO is the generic simple and martial broad groups. As the OP, I can tell you we moved to individual weapon proficiencies (skills as such) a while ago, before I posted this thread. So, for example, Fighters know 4 weapons, and a background can add up to 2 weapons as well.