What I got from the comment section, "This is not a filler fight." Then it's a fight in a side line story. There is a chance I would also complain, if the following condition wouldn't have been meet: This fight is awesome. I also want to know, what's going to happen in the main story further on, but if I get such high quality "side battle", I don't care to wait. Also it is a bit on the dbz-cliche side (though not boring and just a tiny bit), because phoenix man doesn't die and child emperor IS resilient as fuck. But even those tiny specs are outshone by everything, what's good in it. (They even shine themselves.) And it's been just a few chapters in this fight, it just feels that long, because there were also the other S-Heros side stories(, which were also very good-superb).
The only thing I'm concerned about is Murata's health. Redrawing all of those pages must cost a huge amount of "life" energy. I hope he doesn't burn himself out. But OPM is a gem and the pages he is drawing in weeks are there to stay for decades or maybe even longer. (I mean, it's a fine example of modern manga art.)