As I mentioned earlier, denial of family reunification delays and impedes integration. It has psychological, emotional, practical, social, and economic consequences for all concerned. Similarly, the lack of a travel document—note that this is not just travel to the country of origin, but travel anywhere outside of Canada—imposes hardship.
In addition, there's something that hasn't been mentioned: a five-year reporting requirement. People are required to report regularly to CBSA officers, and to answer questions and provide documents, without any information in the legislation about why the information is being sought, who it will be shared with, or how it will be used.
All of these cumulatively create and perpetuate forms of insecurity that are harmful and damaging not only to the people concerned, but to Canadian society itself. These are borrowed ideas from Europe, which, as you know, doesn't have a stellar record on integration of newcomers.