If everything has a purpose then evil doesn't exist

[Neo-Scholastic]

You're wedded to the idea that gods are like an animal with a brain, and as I said..I don't think you're saying much of consequence or anything strictly true even in that context.

Even without that assumption though, it seems reasonable to say that 'want' and 'need' imply a lack, so an omni-everything God it seems would want or need nothing, and thus have no reason to create anything?

Yes, limited creatures that have needs and wants, such as us, having difficulting understanding a purely creative act. Neo-Platonists have an problem as well. Creation as we undrrstand it is additive. That means the Totality grows. What is the ontological statis of that domian or 'space'?