If the Universe was perfect, Lucifer would still be an archangel in heaven, Adam and Eve would be immortal people (possible ape-like) with an unbroken relationship with God himself, paradise would be possibly much more tropical than the Euphrates territories in our timeline. Not to mention snakes wich without a member of their kind to tempt Adam and Eve, they would still have legs. And free will? It may would align with God's will.