Oda's decision to reserve Haki for only the strongest characters on the Straw Hats just destroyed the New World for their fights.
Every Straw Hat should have learned Haki, and been a functional fighter.
Sabaody was all about how the Straw Hats were too weak to beat enemies in the New World.
And then two years later half of them still were jobbers, AAAAGHHHHHHHHHHHHHHHHHHHH!!!! I really think Oda thought he was going to get through Wano a lot faster