It's a Globe and Mail editorial. While their news reporting can generally be taken as objective and very reliable, their editorials are highly partisan. As the present government haven't actively said "no" to the idea of the Sussex couple moving to Canada, the G&M's Pavlovian Response is to come out against it. If the Sussex's decide tomorrow to not to move the Canada the G&M could quite easily completely reverse themselves and condemn the government and say it was their fault for not rolling out the red carpet for them fast enough.
Thanks for the link though. It was a good laugh as it's not every day you get to see the Globe and Mail come out against the idea of monarchy and inherited privilege in practice while trying to support it in principle. It's almost as funny as the editorial they wrote just before the 2015 election when their principled stand of trying to convince people to vote Conservative but simultaneously being against having Harper as PM had the whole country pissing themselves laughing over the contortions the G&M were twisting themselves into trying to argue that one.
Here's a Globe and Mail news story on the subject. The BC premier (from the leftist NDP) is described as being "giddy" with delight at the thought of the royal couple moving to Victoria (the provincial capital). There are extensive quotes from the Monarchist League of Canada and the Royal Commonwealth Society saying (naturally) they are delighted with the prospect.
Victoria would offer comfortable landing spot for royals, says spokesman for Victoria’s Monarchist League of Canada
That of course isn't a definitive answer either, but it shows that you have to look at a broad spectrum of opinion over a period of time before you come to any conclusions.