The only way all this is possible is for God to be "outside" of time.
Something that exists "outside of time" necessarily experiences absolutely no change, whatsoever. If there were any change, it would demonstrate a before and after, and therefore would have occured in time.
If God experiences absolutely no change,
then He is an inanimate object.
I worship the Living God, who is creative, who makes promises, who changes His mind and tells us so. He is living, personal, relational, loving and good. Relationship is fundamental to His character.
But you would have us believe that from His perspective, we are both saved and unsaved, that Christ is unborn, born, alive, dying on the cross, dead, and resurrected all simultaneously from His point of view.
He died once. He is alive.
Christ
became flesh. He wasn't always flesh.
He
became sin. He wasn't always sin. But, He became sin, and He is sin no longer. Not only does God change, but He changes in some radical ways. At the same time, His character does not change, and He says so.
You would have us believe that God cannot create a new song, or invent a new species. Indeed, how could He ever have created in the first place? If you claim that from God's perspective there has always been a Creation, and He has always been a creator, you are straying into the realm of Process Theology, inferring that God cannot be God without a Creation. Your view infers that there is necessarily a Creation if there is a Creator, which means that the Creator is dependent upon the Creation.
You can't say that God could have not created.... because He has never known a time when there was no Creation or that He was not a Creator -- from His perspective, both Creator and Creation co-exist inherently and necessarily.
The Open View holds that God didn't have to create. He was free to create, and is still free to create, even today. He could think of and create a new thing at any time. He is not dependent upon Creation, but rather He is sovereign over it.