Was God's creation "perfect" or "good"? We can consult scripture:
Genesis 1:31
31 Then God looked over all he had made, and he saw that it was very good!
Human decision making can only be perfected if it aligns fully with God's will. He communicated his will - he gave them divine insight - and they chose to defy it. God's sovreignity and foreknowledge of their choice does not impact their choice. His sovreignity allowed and accomodated their choice to stray and his foreknowledge provided a means to guide them through future choices.
Every choice we make is an opportunity for us to better understand and align with God's will for us, but we have no expectation of perfection nor are we established in a perfect world.....it's a good world and we're a good creation. We're imperfect because he allows us to accept or deny his will, but he gave of himself in the form of the incarnate son in Jesus Christ so that our acts of defiance can be reconciled to righteousness.
Faith is acknowledging and accepting his good will. It's trusting that what he said would be will be. It's an initial leap that transitions into the full assurance of who he is and what he desires for us. Faith begins young and immature and grows into something solid and eternal. It doesn't remain blind. If it did I'd have zero confidence in my words today.
Still, how good could they be if their first decision was to disobey their creator. Temptation or not, doesn't make sense. "Good" would have chosen good, it would seem, not bad. But they didn't.
Many of us choose good simply due to our parents teachings; but these two were instructed by GOD Himself and disobeyed. I'm pretty sure if He told ME something directly, I wouldn't poo poo it.
And I don't even believe in Him.