Where Etihad, or anyone else, gets their money from is irrelevant as long as the ‘related party’ sponsor is in keeping with market value, from my limited understanding. Either way FFP has changed since the time of these allegations anyway
There is also absolutely no way that any top team(s) will be lobbying UEFA to do away* with FFP anyway, I bet they are all quite happy with it, City included, as it stops competition and keeps the Champs League tills ringing
*obviously there will be discussions around the rules given CV-19