I agree that it's a very worrying bill with several attacks on important civil liberties.
If we can expect anything, based on recent history, it is that surveillance techniques that previously required onerous human labor, will soon easily be done in automated fashion.
It could also be argued that if someone is a terror suspect, then there may be an immediate risk, but to know so they must have more access, so it is therefore urgent that they do. This is the kind of Kafkaesque circular logic I'm increasingly coming to expect from the state.
As you say, with terrorism there's not the immediate need and there's usually a bunch more information.
Those police did nothing with that information.
It's a reasonable point: Why do they want these extra powers when they've failed to protect so many vulnerable children?