Not a lot wrong with either of his games, and no, he did not cost anyone any games. Aussie pundits blame him for missing Joe Moody's forearm on Beale, but referees are no longer a one man band. There are three other pairs of eyes on the play these days, all of them are miked up and can tell the referee what they have seen; none of them did.
Referees do need better support from their ARs and the TMO, but the trouble is, when that happens, the very same pundits that are complaining about referees missing things, will now complain that the ARs and TMOs interfere in the game too much.
If you are thinking that Ben O'Keefe cost the Waratahs the match against the Crusaders, then think again. What cost the Waratahs is Foley's crap goalkicking and the team's inability to defend a 29-0 lead.