The Tories are free to pick another clown as leader if they want. After all, it's not like they've shown much appetite for competence.
However, quoting myself, we are now through the looking glass (very sly cat reference there 😀) What was is no more. With an articulate, well briefed and backed PM, the Tories will need a really really really sharp leader to make any headway in debate. Being Boris in opposition is not going to pull them back from the opposition.
Early signs are they may as well have made Liz Truss leader again, and be done with it. They missed the clue train. Which is odd - you'd have thought losing 251 seats might have made some wonder.