Man this reaaaaaaly demonstrated why Mias personality is as bad as Saras just. In different ways. But I see why she's frustrated: by the normal rules of the shadow house, she IS correct. Leave the useless behind, her own 'natural exceptional' status... just.
It makes her a bad leader provided other people arent as brainwashed as they normally would be. If they were all drinking coffee she'd be right, you know?