It's more likely to be City than the PL, if anyone is delaying the case. City are producing mountains of evidence. The PL isn't.
The PL wanted Everton's case finalising during the 2022/23 season, and that was after they brought charges in March 2023. Totally unrealistic timescales requested by the PL, and unfair to Everton, and the commission told them so.
Given that Everton only had 9 charges to answer, and we have 115 (or 131 using a different method of counting), our case will take much longer to gather all the evidence, and much longer for it to be examined.
There is no shortcut to the process, unless the PL drop the frivolous charges and concentrate on the substantive ones.