For all I know, he might actually be happy there are no Canadian teams in the playoffs. If playoff runs help to spark interest and gate receipts in mediocre American markets, that might be considered a good investment in the product's future.
It's certainly not Buttman's fault that it's a US-only playoff, however. And in that sense how he "feels" about it is immaterial. If we want Canadian teams in the playoffs, well, it's up to those teams to actually put talent on the ice.