I think the story in KH2 was great and deep (enough to create two more prequel games). The only real problem I noticed was the combat. It felt dumbed down and only required mashing the X button and sometimes moving to dodge, if you felt like it. The reaction commands were a great idea and look cool, however in the end they were done poorly, you really only have to keep hitting the Triangle button, requiring no skill whatsoever. Everything else about the game is great, I don't understand how people complain about the story, it's one of the greatest things about the series.