Is Pain Part of Perfection?

In The Problem of Pain, Lewis represents the pre-fall state of humanity as a perfect existence; God's ideal creation. For Lewis, humanity spoils this creation, creating a fallen and sinful world. All of Lewis' ideals about the pre-fall world operate under the assumption that God could do nothing but create the perfect planet. I do not believe that God is as restricted as Lewis - perhaps subconsciously - portrays Him. The Bible states that God created a good world, but that does not necessarily imply that the state of affairs needed to be absolutely perfect and heavenly. In fact, our class discussions have revealed the philosophical possibility that even pain can be a piece of a good creation; suffering can be a part of a wonderful and loving divine design. I think Lewis accidentally boxes God into his human conception of perfection, which cannot conceive of an entirely good creation that contained pain or suffering of any kind. God's initial sinless creation was indeed perfect, but I am absolutely open to the possibility of seemingly negative and incomprehensibly designed happenings being a vital aspect of a completely good and utterly perfect creation.