From the Church of Jesus Christ of Latter-day Saints point of view, this goes back to questions like,
If God is all powerful, all knowing, and all loving then why didn't God simply create us to be as perfect as himself?
We don't believe that God is all powerful in that he can do absolutely anything imaginable. We believe that God is all powerful in that He can do all that is possible to do. In other words, we believe that there are things that are eternally impossible even for God. We do not believe that God created all things from nothingness. We believe that matter has always existed and God, as a creator, organized chaotic matter into worlds and beings. We also believe that there is a part of mankind that has always existed beyond the matter that we are made of. We believe that mankind's intelligence has always existed and that God created mankind from self-existing intelligence and matter. We were organized through the process of procreation into spirit beings at first and then later we were organized into physical beings on this earth from a more coarse degree of matter and our spirit beings. God could never create matter nor could he create our self-existing intelligences. Because God could never create our intelligences, He could never create us to be perfect. For this reason He goes about getting us to progress by giving us free will and allowing us to choose to be a better being through our free will and choice. God has placed us on this temporary mortal world to experience good and evil and allows us to choose for ourselves good or evil. We actually are allowed to choose our future and where we will end up in eternity.
God knows that because we are eternal self-existing beings, that he cannot control the outcome of what manner of being we will become. If God were to force us to be good beings, we would only truly be slaves and not good beings in and of ourselves. Thus the importance of giving each of us free will so that we can choose in and of ourselves to be good beings. Thus in answer to your question, "Will God get what God wants or will Jesus FAIL?", I say that God hopes that we will all use our free will to always choose good, but He knows that we have free will and it is up to us to make that decision. He has provided the way for all of us to gain eternal life, but it is really up to us regarding what manner of mankind we will become. Many are called but few are chosen because only a few will make the right choice to repent and overcome this world of wickedness.
