IF the arc has a great ending (which I am certain it will) then it would have been somewhat worth it.
Honestly Wano is the first arc (since Alabasta?) where actually getting to the climax of the fights answers a lot of mysterious lore questions. For Alabasta it was Pluton and the concept of Poneglyphs, very early shit that only was given to us by the 3rd round of Luffy's fight.
Wano has:
- Purpose of Momo through Oden's journal
- Purpose of opening Wano's borders and what that actually means
- Purpose of Zunesha (now has to do with Wano)
- Why does Kaido desire Wano outside of it being a natural fortress?
- What is the nature of Kaido and his ogre/oni species?
- What is the purpose of "becoming" Joyboy?
- Not to mention Anime directors/Editors saying that the ending to the arc is "surprising", whatever that means
Just questions like this and I know there are more I'm missing. Other OP arcs don't really have these things about them.