Do you think stopping PMQs would make a significant difference to the accountability of the Prime Minister?
PMQs isn't even about accountability really - to think that the prime minister wouldn't ever talk or address a fellow MP is just hilariously untrue. it's just a spectacle, of course. it's all mostly scripted as well. the PM also knows in advance what their backbenchers are going to say.
Yes, it would make a difference. It would be ridiculous is all other Cabinet ministers had to account for themselves before Parliament but the Prime Minister did not.