the issue with god freely creating is puzzling. but it does seem to me the medievals were right to suppose that god is not somehow more fulfilled with creation than without one. that would seem to imply that god is perfected through something outside himself and that he isn’t himself the fullness of being and goodness (the aseity issue.)
the question seems to be does a “difference” in gods “conscious” experience (willing, loving, relating to creation) necessarily entail a diminishment of his necessarily fulfilled existence (which he has with or without creation.) it may be that these are value neutral differences: i.e. whether or not god creates or is made man ,he will be just as maximally fulfilled.*
now if this is right, and if god cannot be enriched by his creative act – though he can be different because of it – god cannot create for a need within himself or to do himself any good. *he can only create for the good of that which he makes.* given creation then god necessarily wills the good of each thing he makes as such, for itself.
this to me if a powerful (and classical!) argument for universalism based on gods aseity. the only reason god could have to create is to bestow (or “pour out” – love that image!) goodness on what he makes: i.e. to will the goodness of the other as an end in itself. eternal torment and annihilation are not instances of this. therefore, god cannot will these things. (the argument is, more specifically, although god need not create, if he does he must will universal reconciliation to all, for no other alternative is consistent with him willing goodness to creatures.)
*this is closely connected to impassibility. could god freely will in himself something analogous to grief, anger, or patience? in gods triune life these experiences seem to have no place or even meaning. given just the trinity, who would cause them? yet given the sheer fact of creation it can’t be impossible for god to have experiences other than just his triune life. for he at least knows the world, that he creates it, that he became man to die because of sin it it, etc.
but god can’t get these “extra trinitarian” experiences from the world absolutely speaking, for then he would be receiving being (and how could the source of all being receive being?) but how then can god have them? how can god know “loss” or other “negative” emotional experiences, since by nature his triune life is perfectly harmonious in will?