Until the explosion of the Tamatebako, WCI was a good arc. Then Oda ruined everything.
Luffy vs Katakuri was completely unnecessary while Sanji (CoO's was his speciality) and Jinbe (water was Mochi's weakness) vs Katakuri in the MW would have been far more interesting and innovative. Luffy just needed a small clash with Big Mom, he already did more than enough in the first half of the arc.
The cake plotline was too repetitive and long, it just seemed something to not make the curlyhats disappear while Luffy was training.
And more importantly my boy Daifuku didn't shine enough
30 trash chapters... still better than Wano tho.
Wano is just awfully awful