You do know that questions aren't always prepared in advance, that issues happen throughout the week. When you have an opportunity to put questions to the Prime Minister or to a minister on any day of the week, then it works in the opposition's best interest if you're trying to get an answer to a particular issue.
If you're going to have the Prime Minister there only one day of the week, or you're going to have ministers there on particular days of the week, is that not impacting on accountability somewhat in terms of being able to get a response from the government to issues that are in the news, or issues that have arisen on any particular day?