"(Saville is dead nothing can affect him now.)"
It's not for him... it's for the victims and to find out if anybody covered this crap up deliberately.
"That sort of thing should take priority over stuff that happened so far in the past"
I'm assuming they don't stop investigating other stuff. Organisations can occasionally multi-task.
"People going on about "Closure" irritates me as well. It is like people just say it because other people do."
You've clearly not been in a situation where you've needed closure on something then. When something this nasty has happened to you, and you've taken a massive step of reporting them (while already vulnerable before the attack, even more so after), and then to be ignored while the attacked lives their life happily... it's not right and it twists a person up inside. I only know of people who've needed closure, not experienced it myself - but the need seems to be for some sort of recognition that whatever has happened to them wasn't a minor thing, wasn't just in their head, and wasn't their fault. Closure seems to be the general term to sum that up.
In this case I'm assuming (if it's true, which it looks like it is) there needs to be some exposure and investigation despite the time and death of the alleged attacker, so that policies can change to avoid another celeb being protected by the organisation that should have been exposing his crime. They need to find out who is guilty of a cover up so it doesn't happen again.
But hey - by all means, rant away.. it's not like it involved vulnerable kids or anythi..... oh