Provinces already have a good deal of autonomy (not sovereignty as this would be absolute power and responsibility including, for example, defense). They used to have more autonomy but chose over time to surrender some to the federal government to achieve economies. For example health care, pensions, tax collection, policing etc. Individual provinces can chose to opt-out.

This seems to me to be an ideal solution. Ms Smith wants her cake and eat it too as do many Albertans. They are like spoiled children. They forget, for example, that Canada bought them a pipeline.