Indeed - even Mulroney was difficult and he was merely irish.
Given how Diefenbaker treated Balcer and Sevigny... small wonder even French-Canadians who might have been interested would stay away. A party of Bay Street elites that hated all non-WASPs until Stanfield put the "P" in the "PC" vis-a-vis social issues.
Here's what I think his views might be ITTL...
Social: same as OTL. Religious beliefs have no effect on public social policy. Perhaps legalization of soft drugs? A more defendant-friendly legal system.
Economic: balanced budgets, low taxes, free trade, that's about it given the postwar consensus' ideological boundaries.
Federal-provincial: problem is how to resolve his loathing of ethnic nationalism with keeping the federation decentralized.
Foreign policy: ?