I am in the middle of Volume 4 and I have a question about Danmachi

Tuvokfan said:
As the title says I am in the middle of volume four and something is bothering me. I love the world of this novel and I think the dungeon and Familia system is awesome and unique but as of right now the story seems pretty simple and only focused on Bell. Now that he is starting to build a party and thinking about moving to the middle levels I was starting to think the story was picking up but then I realized something about his level scaling mechanic. Since bell levels up so fast, doesn't that mean that it will be literally impossible for him to party up with other people? Even now his newest party member struggles with orcs while Bell, on the other hand, can apparently one-shot dragons. I was really hoping things would get more complicated like new friends and enemies that have reasonable power levels start popping up, seeing as this series has 15 volumes, but it seems like it's just going to be all about Bell and his growth hacks. As of right now, I see no goal for the series. We all know Bell is probably never going to end up with Aiez(?) and that seems to be kind of a weak arbitrary motivation anyway. Basically what i'm asking is does the story stay on a linear path or does it get more complicated? If it stays the same that's fine, but I might want to read something else for a while. I'm sure I sound like a snob and some might tell me to just read and find out, but I should mention that I am reading the novels in Japanese so it is more of a time investment than if I was reading a translation. The content is easy to read but I read kinda slow compared to English.