The new arrows don't feel like worthwhile additions. After extended play, it's clear that they're simply gimmicks. In addition, the waggle functionality doesn't feel precise enough for a rhythm game. We were also disappointed by the poor construction of the default pads, but that should come as no surprise for long-time DDR connoisseurs.
For dance fans that only have a Wii, it doesn't look like there'll be too many alternatives. The game will have a variety of music from the last four decades. One surprising omission from the game has to be the lack of Mii support: why can't we have the avatars we've created dance dance in the game? At least those will have a bit more personality than the generic anime characters that Konami has been using in the franchise. Do it Konami -- the fans want it.