I believe that's a potential flaw in the argument; we're assuming god is perfect, and I am making no such assumptions, based on what we see around us.
The universe is highly orderly, nature is extremely efficient, but they're not perfect.
We're making the assumption that god is perfect, therefore the universe should be.
I say, maybe god isn't perfect. If he's not prefect he can't make perfection.
Or perhaps he is perfect but simply elected not to make the universe perfect. He could have made us perfect too then, and I know there's the whole argument on free will and final judgement...yada yada, but thing is we have no possible way to know if any of that's true. We can only chose to believe it or not.
But I ask you all; being as we are not perfect and haven't really seen it, how do we really know what perfect is? Would we know perfection if we saw it? Don't answer too quickly...the answer might be trickier than you think.