Well there can be no question that there are truths given to us in God's revelation that point to his essential character, and others that point to his covenantal character, we should be careful to note that those covenantal attributes of God are no less "literal" than are his essential attributes. Repentance, then, is not simply something that "seems to us" like repentance. It is literal repentance, he is (covenantally) changing directions because of his faithfulness to his covenant. But it is repentance of a condescended, covenant God who has come down, taking on the form of a creature, in order to glorify himself, and it is repentance that does not in anyway sacrifice, undermine, or otherwise alter his essential character as a se. He repents, all the while remaining the eternal, immutable "I AM." (253-4)Is this easy to understand? No. But I think it remains faithful to the biblical record.
The sovereign, omniscient God of the universe condescendingly repents. Amazing!