Uncreated beings were standing around in need of suffering? Hardly a satisfying response. But I think what you mean to say is that God did us all a favor, in the long term, by creating a world of suffering. Thus the act of creating this kind of world was an act of generosity on His part. In your view, then, suffering IS inherently good, wherefore you should want it perpetuated for all eternity. Oh that's right, I forgot - the perpetuity of suffering is called "hell". That's basically what you want for yourself, then, right? Suffering for all eternity? Hell? No?
Anyway let's go back to your fundamental conclusion. You believe that:
(1) God did us a favor by enacting suffering.
(2) Therefore it was an act of generosity on His part.
Fine. Let's assume that's true. How much generosity does an infinite God possess? An infinite amount, right? Therefore after this world is finished, His intent MUST be to create another planet Earth (this time starting out with, say, Vincent, Bob, and Sally instead of Lucifer, Adam, and Eve), and then another, and another - an so on ad infinitum. Clearly this is NOT what He is going to do because suffering is NOT an act of generosity. Suffering is useful only, temporarily, as a necessary evil to a necessary end, and thus cannot be reconciled with an infinitely self-sufficient God devoid of needs.
If I were an infinitely powerful and self-sufficient Parent, my child wouldn't be suffering the agony of temptation. I would have no reason to give him enough rope to hang himself on. I would create him holy, or not at all, to spare us both unnecessary misery.