Ivison at the National Post has a good article. One of his points is that this is a passage of leadership from one generation to the next.  The Liberals had spent time and effort in organizing a strategy to counter Bernier, and now the proverbial rug has been pulled from underneath them.  

They now have to face an even keeled pleasant man who is articulate and bilingual.  A young man who basks in the glory of his large and possible growing family, a pleasant aspect of social conservatism millennials may find of interest, that Liberals have been known to mock.  

Scheer also landed a few to the broadside of the Government.  Nixing the carbon tax, no HST on home heating, balanced budgets, stronger expression of democracy, and taking the fight to Islamic terrorism.

Stoking the non existent fears of social conservatism, mocking his genuineness, rings hollow.