The Falconry skill node Exposed Weakness is not working. I set my falcon to auto attack a target dummy and compared the crit to normal hit damage ratio. It remained unchained, always matching the minion crit mult from the character sheet.
I tried to trigger the buff with bow, melee and throwing critical attacks to another and to the same target dummy. No change to neither the ratio from the damage numbers nor the minion crit mult in the character sheet. (I didn’t expect the latter to change, as those are general minion stats but the buff is falcon specific.)