For me, the big thing is the failure of the PL to properly assess the facts. They could easily have gathered all their evidence and then briefed a KC to give a full written opinion. It looks like they jumped into issuing charges too quickly. If they were under pressure from the Redshirts, the KC’s opinion would have sufficed, if not to satisfy them, at least to shut them up.There must surely be a full investigation as to how these charges came to be made and why if, no WHEN, it is all cleared
They could also have undertaken not to prosecute and held serious discussions with the club about the club‘s actions and lessons for the future.
What they have done is not professional nor normal business practice.
(All subject to a caveat that I am guessing about the PL‘s action and knowledge.)