I'm a fan of process theology (at least on the days I can believe in anything other than despair), as expressed by Charles Hartshorne and Schubert Ogden, whereby God's perfection is not limited to static categories of being but also extends to God's very process of becoming. Thus God isn't fixed and unchanging, and those aren't weaknesses. These inflexibilities would more quickly qualify as weaknesses in fact. A process God is supremely related to everything, and relationality implies change. One of these changes is in the aesthetic richness of the divine life -- my actions can contribute to the divine life, enriching it when I add beauty and goodness to the world. The thought that I make a difference to the divine life is one of the few hopeful thoughts I can sometimes hold on to.