I can't say it for everyone, but for me Egghead arc isn't that great ...
-Devil fruits origin is a joke
-I don't like Vegapunk ,cause most of his qualities are thanks to his devil fruit, and stolen technology from the past
-Robin stayed with the revolutionary for 2 years and no one tell her that there are survivors from Ohara
-Saul came back from the dead
-Robin's flashback lost importance
-Lucci clashing with Luffy Gear 5 make no sense
-Lucci has awakening while Kaido doesn't
But overall the arc is still enjoyable, and better than Wano for me
Hope next chapter doesn't end with Kizaru still heading for Egghead Island though...
Your first 5 points are pretty superflous.
- This is Vegapunk's hypothesis, not an actual explanation. Theres likely more to it. Why does "desire" will DFs? If thats the case, why doesnt it happen presenty? Or if it does, is someone like Zoro an example of this (demonic aura = devil fruit upon death?), similar to how Nika was seemingly once a person
- Vegapunks genius is his own. His devil fruit is brain capacity. Hes too smart to hold all of his knowledge, thats the point.
- Dragon didnt know Saul survived. Vegapunk only actually knew it was Saul after visiting Elbaf to read the books....
- Saul being alive is an age old theory for Elbaf lol. Many people didnt think Aokiji would kill him.
- it did not lose importance. Ohara is dead. Her people are gone. Shes the only person who can read poneglyphs outside of 3rd eye people. The books do not contain full void century knowledge.