I think in principle it's difficult to apply principles that might reply to a request for dissolution to one for prorogation, because they're quite different, as we know, and as you know and you're suggesting.
In the dissolution situation, the Prime Minister is saying, “I want an election now.” There has only been one case where such a request has ever been refused, which is the 1926 case, which is itself still a matter of some uncertainty. But in the case of dissolution, the only alternative for the Governor General at that point would be, it seems to me, to ask, is there an alternative Prime Minister who could be called upon to form a government? If not, then it's not clear to me that there would be any other option but to grant the request for dissolution.
That would require an assessment by the Governor General. It would require an assessment as well of how close in time we were to the previous election. The closer in time you were to the previous election, the more tendency there would be for the Governor General to want to find that there is an alternative government.
So I think the principles in the dissolution scenario are rather different from those in the prorogation scenario.