Saville was only high profile when they realised the extent of it. I thought the main problem was that lots of celebs will get accusations, and he also had friends in the police who if not covering up, were helping push the 'man with money being faces false claims" narrative. The cases weren't being properly linked, and in an "isolated" case, where the accuser doesn't necessarily want to be the only one accusing a celebrity publicly in an area of the law where women rarely win, then the decisions get dealt with at a lowish level.
Clearly there are other cases, and he talks about the terrorism issues, where they automatically get pushed up the ladder. But also, is it not likely they were also part of a more pro-active approach, where the CPS are more involved in how cases proceed, or are tackled in the first place? As you mentioned, after Saville, the CPS introduced new procedures which aimed to prevent a similar issue in the future, and with an ongoing problem like terrorism, they may be doing similar proactive work.
