nah, if that kind of thing dragged like 20-30 chapters i might drop this hard. I also think the others will have the same thought.
If she had persisted in the way she was in the early chapters, perhaps, as that was entirely a repeated gag, though I still think I would've preferred it to this cop-out and I believe there are plenty of ways to keep it fresh seeing just
how she manages to mess up.
However, outside of that, there is a monumental amount of character development that could be done within the concept. Relative to the other characters, she's in a unique position where she has to win through brain rather than brawn, and seeing her having to learn this and adapt her strategy for each general, turning from a clown against the first general or two, with half-working plans by the third, to a master manipulator by the sixth, would prevent things from becoming stale, as would each general bringing new things to the table.
Well, not that we get to see that, we get "magic stones" instead.
I'd speculate that we're also going to get "hidden power" pretty soon too, given the information we have so far. We know the villain bullied Komari in school, we know there are documents stating Komari was responsible for the massacre but it was pinned on the villain, we have Komari's father stating that he falsely pinned blame on the villain as revenge for bullying his daughter, and of course, above all, we have the classic "Komari blacked out and doesn't remember the incident".
"Sometimes foreshadowing is relatively obvious." - Evan Gottlieb