Leterme is a real liability for UEFA, as you say because of his handling of the PSG case but also because of his inability to keep his mouth shut. This led to his ridiculous denial of any leaks from the IC, but his loudmouthed, tactless outbursts as Belgian PM got him into hot water there. The other thing that I think he's managed to do is to involve UEFA in weldpolitik! This sounds far fetched but PSG are Qatari owned and the handling of their case showed a clear bias, which links to corruption and the world cup. This is bad enough for Leterme's credibility and that of UEFA and FFP, but then Leterme does everything he can to ensure that City -owned by Qatar's great enemy - are stiffed on charges 5 years old and already dealt with, and by means of a procedure which is the exact opposite of fair. This appears to be to repay Qatar for what exactly. It would be thought the recently signed TV deal would mean the Qataris would be the grateful party. Or is an ex-PM still dabbling in politics? And why? Then we get another twist when Facebook take down a platform which is a Qatari vehicle for fake news about City and the UAE, but also Saudi Arabia and the USA. The thought will have occurred to many that UEFA is part of a Qatari web to destabilise the middle east.
This is way above UEFA's pay grade and is the last thing they need. If City have any evidence at all that such connections exist UEFA are in the deepest of mires and the outcome for them would be catastrophic. If Ceferin has the slightest suspicion that any such evidence MAY exist he'll be working his whatsits off to stop this going anywhere near court, and he won't think twice about feeding Leterme to the wolves and any other human sacrifice City demand. At the moment it's just circumstantial, speculation and conspiracy theory ... but we don't know yet what Khaldoon's "irrefutable evidence" actually is.