Using the wiimote WITHOUT motion sensing would make sense, because it has enough buttons, and motion sensing might get messy for competitive matches.
"Hey we've got a perfectly fine controller that every smash bros. fan has been used to for five years, and since this is a new system with new controllers, we should allow people who haven't used that perfect controller a chance to play without buying controllers for a system they don't have. We're not going to use motion control for this game, so I think what we should do is allow them to use the completely new controller with new buttons, since it would be stupid not to. Those gamecube ports have really worked out well, allowing us to use GC controllers for GC games, and new Wii games."
At any rate, the nunchuck style gameplay would make the game much more frustratings to play for physically challenged players. The nunchuck is not for stupid idiots who probably don't even own a Wii and criticize it. Hell, the ****in WII is built to handle all kinds of games, but some people just can't see that, nor provide reason otherwise. HOLDING a controller with two hands, is part of the REASON that its possible to SHFFL and Wavedashing easy. Its all one cohesive unit. With the nunchuck, it's not much different, and you can get used to it in a couple of days. *sigh* whatever happened to just a good regular controller, it never did anything to anybody, it was perfect. This nunchuck **** is only for non-*******. The motion sensor doesn't have lag, but there is no reason to use motion sensing when you have the neccesary buttons and it would not contribute to enjoying gameplay. That's why we won't have to tilt our wrists and twist them during our matches.