I do not disagree that compared to many other systems, we in Canada have a decent system.
However, irrespective of the flaws in other justice systems, we can, and ought, to look for ways in which our own can be improved. I personally do not believe in playing to the lowest common denominator.
We ought to start with returning our justice system to... a justice system. It is a shame if our system truly "has nothing to do with justice". I personally believe that there is still justice in our system, but where our system is erroneously tilted, the rights of the accused are primary to the rights of the victim. If for example, the accused has a past history of violence, that ought be a consideration during the finding of guilt.If for example, the accused is already a convicted murderer, he ought not have the right to cross-examine the victim or the father of the victim. If for example, there exists evidence against the accused that shows a pattern of amoral behaviour, that ought not be kept from the jurors.
What is the purpose of a justice system? Firstly, to ensure the rule of law and order prevails in our society. Secondly, protecting society from those who would do us harm. Thirdly, society speaking on behalf of victims of crime, who in many cases, no longer have the ability to have their voice heard. Sentences ought be not solely focused on "punishment", but rather, primarily focused on preventing those so inclined to do harm, from doing so. Punitive portion of sentencing ought purely be for deterrence.
The presumption of innocence, or the presumption that a person will no to do harm, ought be removed once the harm has been done and the person who did the harm has been convicted. After that, the presumption of harm from that person ought to be assumed, and only once proven to no longer be a threat to society, should they be totally free.