I wouldn't mind a 300 chapter lasting bloated arc IF Oda would actually showcase us any notable fight.
Like it's supposed to be the biggest war in the entire series- affecting the entire world, fights should be naturally the main focus in such scenario, but as we have seen at Wano, Oda can even fuck that up.
Characters involved in notable fights (fodder vs fodder I deem irrelevant)
- Strawhats
- Dragon, Sabo, his 3 commanders, (Belly Betty seems to be predestinedto be a cheerleader) and Koala
- Bare minimum the main Grandfleet member like Cavendish, Bartolomeo and Sai
- Warlords (if not already beaten or dead)
- Admirals, Coby, Smoker, perhaps Sengoku and some Vice Admirals
- Gorossei and Imu
- Worstgen members still alive/relevant
- Rayleigh?
- Perhaps Katakuri or even some of the other notable member of Big Mom's Crew
- Lucci/Kaku?
- Yamato
- Magellan
- Former/current Yonko if still alive
- Mr1
- Seraphim
- Marco?
- Garp if he survives
Doesn't have to be a couple of chapters for each, but at least more than two tiny panels of basic clashing...