I'm tired of people complaining... The reason why it feels different is because its monthly now, so the entire chapter structure has changed. And the art is different because of Hoshino's bad wrist. She can't draw characters as consistently as she used to.
If this had've stayed in Shonen Jump, there would be another hiatus right now because of Hoshino's poor health. But I suppose you all forgot about the hiatus' (November 2008 to March 2009, May 2009 to August 2009, August 2009 to November 2009) already?