I think the puzzle ultimately fails.
We say that God is His will, and at the same time we say that God could have willed a different universe instead of this one. As I see it, the problem is that we're equating the "faculty" (so to speak), which is identical to God, with its relationship to other things, which is not identical to God. So perhaps we can say God is identical to His act of willing (the "faculty"), but not with the content of His will (the "relation"). This same answer, I think, applies to God's knowledge--God is identical to His act of knowing, but not with the content, although that assumes that I've given something coherent, instead of just a confused mess. (I'm not even sure right now whether this entails that God has accidental properties, which I suppose is a no-no.)
Since I'm offering this, I'll say I believe it's consistent with Dr. Vallicella's premise (1) (and therefore Divine Simplicity itself) because the content of God's knowledge is internal to Him in a different sense than is used when we talk about His attributes proper.
Anyhow, if both theism and atheism are incoherent, then what are the remaining options? I figure Emanationism is one...