No, 0 ki is remnant from earlier version. Fighter only. And in earlier editions,gauntlet were "empty hand", did lethal unarmed damage, just didn't count as Improved unarmed strike.
I'm sacrificing 2d6 maul or reach or simply combination of weapons for masteries and my feat and fighting style overlap.
And again problem with wording is that for example dueling requires a weapon so my tavern brawler can get +2 to damage with a mug, but not with steel gauntlets. And yes, I already mentioned reskinning, used spiked gauntlets as examples
Taran, its completely fine if you say no, I can function without it, just feels weird to take fighter with so many weird limitations