Here we go...
The tale is done.
...
Truth Shines!
Great to have you hear, hope you stick around
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I'm starting to get confused here about what people see as ‘no point’(...) .
Let me ask directly then, what is an important story arc that "had a point", and what makes it different than any one that didn't.
I will def stick around.

There is no need to get confused. If there is something very unique about Bakker and what he wrote about in the PoN and TAE series is that reality is a matter of perspective and perception. Good and Evil, Right and Wrong are artificial concepts created by men to bring sense to the darkness that reality really is and so that our restricted minds can appear to function and have a semblance of control.
All I wrote is simply my opinion and how I understood what I read. Is there a right way and a wrong way to interpret what we both read? I doubt it. Especially when much of what was touched upon in these books rested squarely in the realms of metaphysics.
All arcs are important and build to the overall narrative? Maybe. In a sense I understand your point. I personally felt that many arcs were just to fill in pages... Again what did Cnauir really brought to this last series?
A Goddess can hide an assassin from Khellus intellect/powers by having a slave trace mud on his cheeks but her avatar gets destroyed in less than a couple heartbeats by the same character?
You look at the toll exacted by Khellus from everyone in the Three Seas, not least from those closer to him, and he makes a mistake like that with Celmonas? Another Dûnyain? Conditioned Ground and you forget one of your own? You do not dispose of him when you convince Esm that he must die?
He actually has feelings for Esmenet? To the point he goes back to rescue her at a stage that The Ordeal was closing in on the battle he had been preparing and tempering the world for 20 years?
The man who actually rewrites scripture and makes the Men of the Tusk accept/tolerate the Few?
Sorry I don;t see it.
But like I said in my post. What really hooked me on these books was Khellus as a character and maybe I am just disappointed.
But there is no Right or Wrong here in my mind. There is only different points of view.
Another thing that always intrigued me. Why was Esmenet strong enough to carry the Dûnyain's seed to completion so many times when no other seemed to be? Because she coupled with the Ichoroi at some stage?
What is important to a reader in a tale is a matter of perspective only. ;-)