There was a press report that City had sought clarification that rules changes couldn't be applied retrospectively. I would have thought this was a pretty straight forward point of law. This could have been something to do with Mancini, or to the provision of external information, I think. But we don't know yet.
If the panel concludes in the autumn as people expect with a decision early next year, there will be a detailed report at that time, even if there is a later appeal, so we will know what has been going on.
I wouldn't worry about City. Delays don't really affect the club at all. They affect the fans more. But they affect the PL the most. It's so stupid of them to let it get this far.