Hard for me to put myself in a Conservative's shoes but I'll try:

I think some in the party would want Jamil Jivani because he has tried to take matters in his own hands to talk with Trump when even PP is trying to moderate on that.

I think the closer-to-moderate/PC wing wouldn't mind Andrew Scheer taking over again, but I don't see any indication of Scheer wanting that position at this moment. The PC-wing are indeed getting a good chunk of what they'd want from this Carney Liberal govt.

In fact, no-one from within the party is showing any desire to take PP's position at the moment, but from outside the federal Party? I have some possibilities in mind:

If the UCP in Alberta loses, then Marlaina Smith may want to lead the Conservatives, as her politicking and dogwhistling seems to be what much of the party base likes. Doug Ford, though unlikely to be out of power anytime soon, may see an opportunity down the line to exit provincial politics and run for CPC leader on a more PC-populist platform. Some astroturf candidates propped up by O&G, billionaires or MAGA billionaire and US Republican think tank money could emerge from the fray at any moment they think is ripe.