I mean, does this spell last arc to me, yes; but axing? Not really?
I didn't feel any jarring jump in the progression that this is axed. Story might feel a bit short, but 15 volume isn't shabby.
Now that you made me looked up how many volume there are I just realized one thing...
Ashiro only got a volume cover on Vol. 15 while Shinomiya already got two and as early as Vol. 3
It's so joever...
On the one hand, an axe would have had this manga suddenly end. On the other hand, we're speed running powerups and asspulls that easily could have been spread out for another 200 chapters. So maybe not an axe, but definitely a wrap this shit up already, but still being given a lot of rope..
Anyway, I was wondering what happened to Shinomiya.