Peter, we can’t be sure but I think this angle has only come about as a result of Conn’s article which states UEFA deemed Etihad to be a related party. Of course, the Conn article could be complete bollocks. If it’s true though then your point about UEFA perhaps not pushing it due to it being deemed more or less fair value could be spun the other way too. Maybe City agreed to disagree with UEFA on the related party issue but didn’t push it and allowed UEFA to class it as a related party deal because they’d signed it off as fair value anyway so it wasn’t worth really arguing over? I don’t think any of us know for sure though - the 2014 settlement agreement made reference to a couple of secondary sponsors and that we’d agreed to not raise the value of them (for a couple of seasons at least I think), but there was nothing about the Etihad deal.
I have less of a regard for the likely accuracy of a David Conn piece than others on here for reasons I've expounded on at length elsewhere, and think his assertion that UEFA has been deemed a related party might derive from an assumption on his part that this must be so given the PwC advice to such effect. IMO, other information in the public domain suggests his assumption could be misplaced.
I take the view that City's settlement agreement is very likely to have dealt with the issue of which parties are related an which aren't for the sake of certainty going forward, and have two points in that regard:
1) If Etisalat and Aarbar (and it's stretching the bounds of credulity to suggest that these aren't the two 'second-tier sponsorships referred to in the 2014 UEFA press release) were deemed related parties, why were they specifically dealt with in the settlement agreement? That makes no sense to me when UEFA could easily have adjusted the fair values of the sponsorships for FFP purposes.
2). I don't see it as credible, in the light of the leaked information as to why PwC were alleging related party relationships with the Abu Dhabi sponsors, that Etihad would have been deemed a related party if Etisalat and Aarbar weren't.
So I remain dubious regarding Conn's assertion. I suspect UEFA will be likely arguing that City have stated that Etihad is an unrelated party, yet it was receiving funds from City's owner to divert into the club under the guise of the sponsorship contract. I'm sceptical that the original UEFA stance on the relayed party point can really help us by being regarded as a material issue now.
As to the point that one can spin a lot of these arguments two ways - yes, of course. People are desperate for issues such as this to be black and white. In fact, in pretty well all disputes that are litigated there are arguments on both sides and the court or arbitral tribunal decides on balance whose arguments they find more persuasive.
Obviously, I hope in this case it's ours. But assessing the likelihood of the respective sides prevailing is basically just a huge guess at the moment because no one knows what evidence they're both putting forward.