“Integrated team“ doesn't mean that the police don't remain in charge of the investigation. That was made clear in a recent decision in the Supreme Court of Canada called Beaudry. It recognized that the police have an independent function to play in conducting their investigations, and prosecutors have an independent function to play in deciding whether to prosecute.
The court went on to say that even in cases, as in Quebec, where you have pre-charge approval of cases, it doesn't take away from the police independence.