If there is a creator, so what?

[Ignorant]

Yes. No.

What's the difference? [1]

Is there more to your definition of "God" besides "the goodness in which things participate"? Like, God doesn't have to have a mind or be a creator or anything else that a deity would normally have? [2]

1) God = goodness itself. A thing's goodness is a limited participation in goodness-itself (the limits determining what-sort-of-thing it is). A thing's limited participation in goodness-itself subsists as a thing distinct from the goodness in which it participates.

2) If by creator you mean the primary source or cause of everything else's being, then sure, that goes along with god as subsistent-being (and therefore the primary source of all participated (i.e. created) being).