It is a necessary measure, but it's insufficient. It only lets some into Canada for 90 days, which is really not that much.
I think we also need to look beyond the western definition of family members. For Hong Kongers, our cousins and uncles are just as close, and we need to extend that family reunification to extended family members who may not be considered traditional family, as well as remove the lottery system for Hong Kong families, because there is definitely a growing danger of being in Hong Kong.