"Naivete is the cornerstone of our faith in my opinion - Jesus himself
even appealed to the necessity of a child-like attitude and innocence
in approaching the conversation."

I’m not sure I understand what you are trying to get at. I have an idea, but I’m not sure. I don’t understand how Jesus appeal to the necessity of a child-like faith makes naivete the cornerstone of our faith. On the contrary, Paul said in Ephesians 2:20:

"built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone."

Jesus is the cornerstone, not naivete, and not child-like faith. Jesus appeal to child-like faith is about three things humility (due to the child’s status in Hebrew culture), openness, and trust. Yes, there is an element of naivete within the latter two, but this is by no means the cornerstone of our faith. Further, Paul makes calls to maturity, being able to discern both good and evil, and rightly dividing the word of truth all throughout his epistles. In fact, he says,

"…until we all reach unity in the faith and in the knowledge of the
Son of God and become mature, attaining to the whole measure of the
fullness of Christ. Then
we will no longer be infants, tossed back and forth by the waves, and
blown here and there by every wind of teaching and by the cunning and
craftiness of men in their deceitful scheming."

Our child-like faith and naivete have little to nothing to do with our understanding (we are urged to gain in that) and everything to do with how we view ourselves and how we approach the King.

"Sophistry and complexity brings with it a level of arrogance that does
not belong with Jesus; we become out of touch with what is really
important, we end up "intellectualizing faith" - which in itself, it’s
an oxymoron.  I know because I was there once.  I put in my years of
Greek and prep for seminary. I came full circle back to the simple and
back to the beginning."

Same here (except I’m still pursuing seminary). I’ve a feeling I’ve come to many of the same conclusions you have. Much of Western Christianity is devoid of anything of even remotely valuable to the world. It’s a bit disgusting, really.

Let me give an example of something I think illustrates your last point. Most Christians assent to the concepts of God being omnipotent, omnipresent, and omniscient, right? As far as our doxis goes, that is really the important thing, that we affirm these fundamental truths. How we make sense of those truths isn’t nearly as important. For instance, Calvinists and Open Theists (I am an open theist) are incredibly diverse in the way they make sense of things. No matter what logical inconsistencies one group thinks they can find in the other and hold that omniscience does not make sense within the other’s framework, the truth still remains that the other group affirms God’s omniscience. That is the important thing, on that much we agree.

Something else, true unity is not being united by our beliefs, true unity is being united in spite of our differences. Paul said nothing of "Unity of the Word" but he did talk about "Unity of the Spirit."