I'm broadly of the view that MPs really should seek to represent their electorate first, so, if she believes this is the best way to represent her electorate and that's her motivation, fine. But, it's not great for the health of Canadian democracy overall to move closer to a two-party system.
I would really like to see the NDP have a federal resurgence. It's going to have to come through new messaging that can cut through and connect with voters. It will be tough to make that happen while fear of the US is the main emotional driver pushing non-Maple-MAGA Canadians to huddle together under the banner of the Liberals. That could well take years, but on the other side of it there will be opportunity if the groundwork is done right while the party is on the outside.