I've read this manga a bunch of times already, and i can say that it is a masterclass on writing. The switch of the pacing is a welcome decision by the author, something like jojo's resetting arcs for example. If the manga will or not get axed, is another matter, but I don't think it is too big of a problem, so many good ideas get disposed of right away because they can't gather attention, and so many stay keeping on on keeping on only through hype. If all who have the means to buying it, buy, and still gets axed, we just have to hope the author will keep working and give us some new work.