Honestly I don't mind if Wano lasts another 60-80 chapters if it meant every notable villain and protagonist had big moments to play it all out. The one big thing Oda does extremely well is "personality". A lot of people didn't really care about Apoo before the last few chapters and now he's become a pretty big deal. Ulti and P1 have been better now because of their increased exposure. Nami and Usopp are getting great moments even though they were brutalized this chapter. We need those for Sasaki, Whos Who, Black Maria, Chopper, Robin, Brook, Franky, Smoothie, King, etc etc etc.
Do that for every supernova, villain and Strawhat (somehow should each get a major fight), and the payoff will be extremely worth the arcs length.
I'll be surprised if villains go down in the next 20-30 chapters. It almost doesn't even feel like we are hitting that stage yet. I feel like Oda just wants to keep drawing the chaos