The extra attack on crit or kill portion of the feat isn't working as far as I can tell. Selected it on Lae'zel at level 4. She took battlemaster at 3 and chose all but rally for her maneuvers.
The toggle seems to be working to turn the -5/+10 on/off, but I haven't figured out how to see the dice rolls and applied mods yet so I'm not certain.
PS - IS there a way that I've just not found yet? To see rolls and mods, I mean?