God doesn't strictly speaking "need" to create you are right: but he chose to reveal himself (the Logos) as the Savior:
- and why? Well, the word Savior
implies that there is something to save. And why is there something to save? Because our first parents messed up, and we've continued in that unhappy tradition (and even if we did not, we still live with the miserable consequences of their fall).
Which once again makes me ask how one can reconcile the unblemished, "very good" creation of God which only tasted bitterness after Adam's fall from grace, with the evolutionary model which actually requires death and corruption from the beginning?
that is the only way we know him.
Yes, and that is our doing - God's loving response to our failure.
As such given his free choice to reveal himself as the Savior in order to be consistent he "needed" to create.
I think you're putting the cart in front of the horse. This reminds me of the whole "predestination" debate, which is perhaps a case of hitching the cart in front of the horse in the area of soteriology (the exact numbering of the elect before the foundation of the world does not undo the free will of mankind by way of some irressistable grace, but foresee's who will persevere in the grace of God and save their souls).
God creates for reasons entirely unknown to us - this is His plan. However, His providence/omniscience also encompasses any possible mischief which our free
will may cause, and will not allow this mischief to cause the creation to end in futility (or comprimise His plans.) The way
God has chosen to overcome our sinfulness, is the economy of salvation revealed to us.
Of course, after awhile this starts to become confusing since it can have the appearance of resulting in a lot of paradoxical loops in time - however this is not entirely true, since much of this is "explained" (really hidden) in the incomprehensibility of God Himself, and is known to Him from "before" there was "time."