As I've stated publicly before, I think the best options that respect both the work of the House of Commons as well as the work of the Supreme Court would be for the government either to proceed by legislation, as you have before you in clauses 471 and 472, or to direct a reference to the Supreme Court, not both at the same time.
I would support any cause of action that suspended or delayed one of those activities. Ultimately, that is a policy choice to be made by the government. I personally have no preference as to which choice the government should make. It's wholly within the government's power.
To be clear, it's within the government's power to do both at the same time. It is not illegal or unconstitutional, but it is imprudent and it is injurious to our democratic institutions.