Current brawler's flurry behaviour is... odd in regard to "differently sized" creatures. Small creatures like kobolds halfling etc get a very high malus for some reasons that i cannot comprehend. Large creatures just return an error.
Also... why is the damage currently listed as 1d1 with a "check the unarmed damage" note? True, the brawler's flurry does change both unarmed and weapon damage, but so does the monk.
[EDIT] i had used improper terminology and i am now also providing a mock character i made up today as a reference. ("mock" being the keyword here, sorry if it seems too silly. I like doing silly stuff). Disregard the rock throwing note as i opened a different ticket and used this one character to highlight both.
Windows 10 x64 Home
Yeah... where to begin...
Brawler's Flurry is "weird" because you have a Medium Sized attack equipped to a Large creature.
Monk's Flurry is actually a special OS block, I have not taken the time to do the same for Brawler's.
You want the same treatment, then this is a OS Feature request.
Ok. Sorry for the trouble and thanks!