UPDATE 6:00PM: Peter Crithary, Marketing Manager for Production at Sony Electronics has tweeted:
Excellent feedback & unanimous, everyone wants S-LOG 4:2:2 output, so we implement with ability turn off LUT on HD-SDI SL output
This will be a paid update.
James Webb adds:
This may be well known already, but I was informed yesterday the S-Log firmware update can only be performed by Sony. No authorized dealers.