@NoTofu
Well paced moments artfully done can leave a much stronger impression than a rushed plot that goes in one ear and out the other.
Though honestly, you're not wrong. The current publishing situation in Japan is just not well suited to producing good stories. Anything that doesn't maintain a high place in the rankings gets axed, and anything that keeps placing highly gets stretched out far past its due date. As a result, lots of potentially good stories get axed early and long running series suffer until they get stuck with a rushed ending. In the end a lot of authors resort to creating derivative works that are proven to appeal to a mostly juvenile mass audience.
The weekly release format is also not conducive to good storytelling. Peaks and lulls in tension are essential if you're reading a complete story back to back, but an audience that only checks in on your story once a week will want things to be at a 10 all the time. Not to mention that a week is not enough time to write a careful story. Even a monthly schedule is pushing it. Once authors run out of material that had written out beforehand, they often end up clutching at straws.