Okay, so I’ve been doing some thinking and some reading and some consideration, and I think I have a solution to the problem that I think none of the Thomists will like.
P1) There are incompatible perfections to God (state of creation and state of passivity)
P2) These must be resolved by taking in one and rejecting the other
P3) With no final cause or essence to operate by in scenarios of incompatible perfection (as God’s essence is simply perfection), this requires the freest will to choose by voluntude
C1) Thus, God can and must act of voluntude
The reason I think the Thomist will disagree with me is because this necessarily means God is open to different state of beings, to which challenges to some extent total immutability. But allow me to make a defense for my proposal; God is by definition actuality and perfection itself. If that be so, whatever God is, actuality is, and whatever God isn’t, actuality isn’t. As such, what we conceive as actuality is simply a reflection of God’s current, eternal state of being. This is further supported when we consider how creation makes God no more perfect, yet nonetheless it is seen as a higher mode of existence when we do meaningfully create (relationships, families, lasting legacies) then when we don’t or do the opposite. As such, the actuality of a state of constant creation must be found in God too, who is actuality. Yet this creation, I say oncemore, does not add to God’s perfection, for it was equally perfect for him to never create, for oncemore I say that the state of God determines actuality and perfection.
Thus, it may not be a contradiction to call God pure actuality and simultaneously say he may have been in a different mode of existence then he currently is. It also isn’t a contradiction to say that God is immutable after his eternal choice yet ontoligically, oncemore, may have chosen differenlty then how he chose. Thus, God may be both voluntarily choosing and pure act all at once.