It seems like the league has a smart and easy out here. It can state that it accepts Onana's interpretation, drop any punishment for Garnacho, and state that it takes the issue of racial abuse seriously, as evidenced by this thorough investigation, so players must be mindful of their social media conduct.
Done. Dusted. They don't punish a guy who doesn't appear to have done anything untoward, and look like they are actually willing to back up their policies.
Since the beginning of VAR I've thought a challenge system with a limited number of challenges was the way this should be implemented, and I've only grown more convinced of that since.
The video replay should be there to support the ref to be certain they've made the right choice. To me, that means having other people in a different booth reviewing and making decisions is wrong. It takes away the ref's responsibility.
Video review should only be the on-field ref looking at replays of their own decisions and then confirming or rejecting them. And the review should be generated by the teams, not a secondary group of officials.
Cut out everything but the techs queueing up the replays, get rid of the lines and freeze frames, let the refs look at a total of 30 seconds of some different angles of the play in contention, and then move on.
Human error will happen but we'll only have reviews of actually contentious decisions, and the person accountable will always be make the decisions.
Also, everyone responsibile for the current implementation should be laughed out of their positions.