[JulianLW]

It's not exactly consistent with the rules of the perk but you could give a character with only Brawling a chance to buy a Weapon Adaptation, Knife with Brawling. With one point, Brawling replaces DX for a punch, and Knife defaults to DX at -4. So with the perk, that one point would buy it at Brawling instead of DX. It would only help if you had spent more than one point in Brawling. And it would give your Brawler, essentially, an impaling or swinging option instead of a fist-load and a somewhat better (well, less dangerous) parry against an armed opponent.