Absolute Creationism and Divine Conceptualism

Platonism offers an ontological assay of things in terms of substances and properties which are exemplified by those substances. Logically prior to their exemplification, substances either are mere bare particulars or simply do not exist. Since logically prior to his creation of properties, God is either a featureless particular or non-existent,. In either case, He is impotent to create properties. It seems to me that absolute creationism, while at first blush and easy and obvious solution to the challenge posed by Platonism to divine assaity, proves upon examination to be a dubious doctrine.