I'd say God should be 'big' enough to forgive Adam and Eve
God did gave Adam and Eve the chance to admit their mistake, and should they have done so there was little doubt that the problem ended there and then (Gen 3:11,13) and all will be forgiven. Instead Adam blamed Eve, Eve blamed the Old Serpent.
he'd have to remove the tree of life or they'd become Gods and could then deal with him on more equal footing
our short lives give a grim picture of what will happen if God allowed us to be immortals in our fallen state. we would've invented nuclear weapons a lot sooner, and would've wiped out ourselves from the face of the planet, and if not we'll experience endless senseless suffering from each other. of course, we may delude ourselves that in all that expanse of time we will start gaining wisdom on how to live apart from the one that is the source of Wisdom. The bottom line is that we dont really know what we are doing. At least I can speak for myself.
God could easily start over with a much better design.
"So will My word be which goes forth from My mouth; It will not return to Me empty, Without accomplishing what I desire, And without succeeding in the matter for which I sent it."
And because of freewill, its only a matter of time before some of those newly made creatures rebel against him, and will he start over again?