The antinomy of the finitude of space and time

Hi Rabbi,
My question focuses more on Leibniz's position on the subject.
How do you relate to his approach, that God had to have sufficient reason to create the world at a certain moment. In other words, what was there until then? And what suddenly happened? Or maybe in your opinion it is simply an antinomy and not necessarily an answer in Jewish thought, or in reason…
 
And a related question – regarding parallel universes, why not assume that there are an infinite number of worlds right now, if God is infinite?
Leibniz says that this is the best of all possible worlds, but perhaps there are many worlds that differ from each other in subtle ways, and each is optimal for itself and its goals.