My quick thoughts on the chapters
HeroAca: Even though I like this manga, the current arc just feels hollow and I'm not feeling the dread/fear/hype of the buildup. At best, it was just okay. Maybe it's just too many chars I don't care about or maybe too many things happening at once.
Chainsaw: Crazy imagery that I like to see from this manga. The Denji vs Doll fight was terrible honestly. Might be the worst of any major battles in the series thus far. The ending has me intrigued for what is to come.
Neverland: Compared to the previous chapters that led to this point, it honestly wasn't that bad. People complaining about the "price" are being impatient. We don't know what actually happened yet. If it is a BS asspull next week, then complain. I don't really like this manga much anymore, but even so this week's chap was far from the worst in this arc.
Jujutsu: Badass fight honestly. The techniques and reactions from the chars were great and live up to the hype. The ending was very interesting and although we don't get a full picture of the territory, it looks different from the initial version from earlier in the series. Has potential to become one of my top 5 fights.
Clover: Better than the last 3-5 chapters with the fodder dudes, but this part of the current arc is so damn boring. I don't even hate Clover, but I just can't be bothered to care. Maybe next week when the fight starts, it will be more interesting.
Bokuben: Boring arc overall, but had some fun/good moments here and there. Next girl should be more interesting, so let's see if Tsutsui can execute it well or if it will end up like this arc.
Mashle: Not as funny as some previous chapters, but I understand it was set up for the confrontation between 3-lines and Mash. Wonder if we'll get a threat or if Mash will just clobber him. Could see it as a problem if attempting to build conflict/tension. Part of the reason why I don't like OPM anymore.
Undead: I really appreciate how the other Union members' abilities were hinted at instead of outright told to the readers. I love when authors don't underestimate our intelligence and let us think for ourselves. The action panels were really good as well. Also, the characterization was great even with sparse dialogue.
Ghostwriter: Still a really good manga. I was scared that pre-serialization this would end up being hyped up and turn out to be trash like Witch, but so far it's proven that it has capable storytelling. Let's hope it continues. If it ultimately succeeds, I hope it's because it's actually good and not just riding off the "boost" of Kimetsu's ending.
Are these "dash" series those that are moving into new arcs?
Not necessarily. The preview pages for the next issue has a theme. The theme is based on which series gets the cover. In this case it is a theme for Neverland. Probably "dashing" towards the climax or something. The previous one had some sort of theme for Jujutsu. The other series are the ones that are getting Color Pages or bonus pages. Chainsaw for Pop poll, Act for special announcement, Bokuben for Fumino arc, and Ghost Writer gets bonus pages for 3rd chapter.
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Mashle volume coming out soon. Can't wait to see if the sales are on par or better than Undead. Hopefully it doesn't disappoint. Otherwise, people might start a "Pushle" meme. Since some volumes got moved to a later date, Jujutsu and Chainsaw might be the top sellers for the next set of volumes. For first week numbers, I'll guess 120-150k for Jujutsu and 80-100k for Chainsaw(don't have prev numbers to compare to, so I'm just making up based on what I remember or want to see). Not confident on Mashle number, but 8-10k is my guess.