Nothing personal, but I don't really care about Chelsea - their sanction, imho, was a fudge and not the greatest moment in PL history. As clear a case you could ever see of negotiating a settlement and then justifying it with mitigations that don't make a lot of sense. Surprised the disciplinary panel let them get away with it, to be honest. Still, it's done. I have no great desire to discuss it further.
My only point was that the PL admits, in what I think is legal terminology, that they would have been unable to prove their allegations - on the balance of probabilities - due to their inability to access Abramovic's information in the same way they will be unable to prove their most serious allegations against City due to their inability to access information from Mansour and Etihad. Unless they are saying admissions of guilt are less persuasive than interpretations of documents that are contradicted by i) witness testimony and statements and ii) financial information selectively chosen by Mansour and Etihad.
Of course, it's possible that the club left some particularly incriminating evidence on their servers - let's be honest, they don't seem to be good at controlling sensitive information. But the chances of that must be ridiculously low.