but what is the point? Just complicating stuff.
It is to state whether a character is trained to use the weapon effectively or not.
To me, the categories are not about power but who is trained in what.
Basic requires no training.
Simple is basic militia training and self defense
Martial is military training.
Exotic is regional military training.
Advanced is special or hard to obtain training.
If your fighter never being to the deserts, he wouldn't know how to use their "khopesh on a stick".
Otherwse why do we keep wizards from wielding greatswords?