Adding filler at this stage will just break up the flow of the whole thing. Everybody has chosen their opponent and they are ready to give it all.
The flashbacks weren’t that bad and they came about at the right time. They highlighted what everybody in Luffy’s crew was feeling.
Kishimoto has just fucked up the whole Naruto ( I am assuming you read Naruto manga).Originally Posted by .noname.silent
There is no comparison between the two. Both have their own place in the manga but the way Oda has developed OP is just amazing. Naruto still has time to grow, so we will see how it goes.