A lot of Church Fathers were Platonists
How many is "a lot"? Which ones?
Every change is from one perfect state to another.
'Change' from A to A is not change.
God's Divine Energies are all "perfect", yes? God's Divine Energies are myriad, not simple. God's Divine Energies do not act the same way at all times (the earth wasn't always flooded, King David's son wasn't born pre-smitten, etc)
Therefore "Divine Perfection" (perhaps we should say glory instead) can move from one manifestation of perfection to another manifestation of perfection and there is a change but at the same time there is not a change *depending on the sense in which the word 'change' is used.
God became materially mutable; Change.
God died; Change.
God was "mastered
by grief"; Change.
God was acted upon by thirst and hunger and altered by his environment; Change.
God the Son was and is the Word, was obedient unto death, humble, and faithful to Israel; No change.