LPC + BQ makes more sense as the BQ isn't too friendly with the CPC.
Besides it's time the BQ had some power in federal politics, if for no other reason than to show English Canada that they're not the monsters we think they are.
That's fair, but I doubt it would last long. Quebec voters can be a bit fickle and the BQ might not be as patient as the NDP+G have been. I would guess non-confidence and a new election in about a year.
That's just the prediction on if the election were held today. I don't think the trend is showing any signs of stopping here. A couple weeks ago this same prediction gave the Cons an 80% chance at a majority. And even that was seen as a massive decline for them.