Did Saki become Head of the Ethics Committee?
According to what she said in last episode


  "The Department of Exospecies Control became a direct subdivision of
  the Ethics Committee and I served as both a member of the Ethics
  Committee  and the Exospecies Department Chief."


She is never mentioned as Ethics Committee head and we can assume because she seemed to focus about queerats at this time and wasn't leading the whole village, while the Ethics Committee head is more likely a leader to the village. But in the future she might be.