I agree with you. I think having STR. INT. DEX and FTH without really representing those stats are really misleading. STR does not represent the strength of a character. It represents what weapons you can wield and its damage. Same for other stats.
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But for the nomenclature alone, STR, DEX, INT, FTH could be changed to
- Sharp weapons mastery
- Staff weapons mastery
- Bonk weapons mastery
- Bow weapons mastery
So it still somewhat make sense if a spear requires sharp and staff weapons mastery, etc. Your suggestion is far more liberating though. But the character would basically have full proficiency in all of the weapons. Sword in one hand, bow in another, with extra main/off hand weapon wielding staff and shield. All of those yield full efficiency.