Imo, Oda's biggest mistake was offscreening the BMP. Even if you kept everything the exact same way (BM one shotting P1, Brook helping Robin, Inu/Neko vs Jack/Pero), the BMP could have totally added to the whole raid.
- Yamato vs Smoothie could have been an easy matchup to dish after leaving Luffy/Kaido and before stopping the bomb
- Bepo fighting Snack or something via Sulong could have been cool
- Chopper fighting Daifuku in Monster form
- Brook taking on Amande after the Black Maria fight or during it
- Nami/Usopp taking on Gallette/Mont D'Or after P1/Ulti being assists from BM
- The rest of her crew falling to other named characters in randomly at different points.
Now, thats a ton of extra bloat, but I feel like the arc unironically needed ~10-15 more chapters of fighting (i.e. Awakened Queen/King/BM/Kaido) anyway. I assume he's going to use them somewhere else (possibly as allies because of Pudding), so maybe thats why he didnt use them.