This game is yet isn't like other fighters on the market. There is a lack of variety to the combos and options for attacking. Each character has only a handful of moves and that is it. It's like comparing the Naruto or Super Smash Bros. to games like Street Fighter or Soul Calibur or Guilty Gear. The reviews complain that this game panders to a very particular crowd and I agree, although I still like both Dissidia games a lot and I'm not the hugest FF fan, either. I do wish all fighting games had a Campaign mode like this, though. And I love leveling up.
Duly note of course, that Tekken 6's campaign mode was awesome. More fighters need to take the Dissidia route and have a god damned story...