But that doesn't always (there are and there are none) work.
Best example: Over Time - art en story awesome, it was mainly about slice of life. It was very good imo and had a lot of potential. What happened? Dropped
Other: Hands - about handball never scanlated and I don't know what it is about but the intro was starting with the slice of life part and it seemed that was also a major part in that story. What happened? Dropped
Just read chapter 6. I really enjoyed this one. Yeah it's simple and a prototypical shounen plot device, but I still enjoyed it a lot. The addition of the chibi, fatty, yankee, and Tatsuo is something this series probably needed.
I think it will survive, japanese people really love characters like Sen, and it´s a great point +; if they introduced a character like Hibari(KHR) or Shin(Eyeshield 21) it would gain even more poppularity, i don´t think that a guy like Seidou have the same charisma as Hibari or Shin, and people really love those kinds of characters, good characters can sustain a manga.