the fact stands that the Marineford war will never be topped by anything Oda writes in the future, unfortunately.
He can if he just put his focus on important plots and characters than shit. For example, Wano could have been great if the main focus is just on main forces of Kaidou and BigMom, SH, SN, instead of Gifters, Orochi, all wano characters. Or atleast let scabbards die or rest for the rest of the war. Could have been way better without run piece or stall piece and with Kaidou motivations, and ambitions, why wano is closed, Oden not being dumb, not off panelling hour of legends etc.