Cami & Drew have great programs this season (two of my favorite pairs programs this season), but they still have to match their exquisite abilites with consistent technical excecution and increased confidence. There's no way to count out Walsh/Michaud, as they are great competitors with huge self-belief, despite not really being all that impactful or wowsa on their elements. W/M are just generally very consistent when it counts. If Luba/Dylan have got things together and are executing well and their fp turns out better than expected, then they will probably be the second choice behind Kirsten/Michael. So, it's more than likely a battle for second between W/M and Luba/Charlie, unless Cami/Drew find their mojo and kick it clear out of the arena at Cdn Nats.
If Luba/Charlie continue to improve at a fast pace and find better music selections and increase their difficulty, over time it should be possible for them to surpass Kirsten/Michael. I say that because by this point, I don't think K&M have overall a compelling 'it' factor, nor any explosive elements. K&M generally are watchable and consistent, particularly on their jumps and throws, and they have increased in confidence. Plus, they have better programs this season from Marcotte that can grow over the course of the season if they put a bit more heart and emotion into them. Their programs have cool, yet derivative moves that albeit Marcotte was clever at pulling together from her own work and recent work from other choreographers.
Possibly, Gauthier, M-F Dubreuil & team will find material that's more compelling for Luba/Charlie going forward.