I guess I know where Oda was coming from removing the battle from the people's eyes.
It was a festival do honor the dead while they also made wishes for the future and most of them happened as they fired up the air vessels...
Wano has been suffering for more than 20 years, Oda just didn't let them suffer on the night of their liberation as well, it is poetic and at least he tried something new...
But... It is underwhelming, specially with the kind of setup Oda usually does for the finals fights, well who knows.