As far as Liverpool goes, they paid a settlement in 2013 so that was closed off at the time. Whether we could have gone further with that, who knows. Maybe we would have done had this happened after all the other shit we've had.
With United, it was a "minor" breach related to the changes affected by Covid in financial reporting. What exactly isn't widely publicly available, just like the charges we have.
Tbh like everyone else here, I dont know what has triggered an investigation on the Premier Leagues part, and we'll probably never know.
What I would like in future (which we won't get because the Prem are a historically incompetent group of people in all aspects even beyond FFP) is an actual press release explaining which specific rules have been broken rather than saying "rule C17, rule D12" etc.
They have all these handbooks available, why not make the effort? They've set a narrative here by being so haphazard about it.
It doesn't even benefit them, because now you have this unbelievably raised expectation of how severely we'll get punished and whatever they do that isn't throwing us out the league and stripping every trophy since the 1958 FA Cup win (neither of which are going to happen anyway) is going to be seen as going soft on us because they allowed the story to spin out of control by dragging their knuckles.