In the unlikely event that the UK were to abolish or deprecate its monarchy, Canada would still prefer not to re-open the Constitution. This might indeed lead to Canada worshipping "The Crown" without anybody to wear said ceremonial headgear.
In other words, the logical contortions of a democracy naming one family as being more important than anyone else, and it being a family without power anyway, are less painfully absurd in Canadian politics than discussing the Constitution. ^_^