I'm looking forward to this game, but really, I see no point in forcing the D-pad controls. If you don't want to map the controls to the Nunchuk and WiiMote, fine, but please give the option of mapping the controls to the classic controller as an option. I didn't enjoy being forced to use the WiiMote on NMSB, and I don't really care for it here, either; I've never found it to be particularly comfortable.
I prefer the options provided in Mario Kart Wii or a Monster Hunter, where you can pretty much use whatever freaking control scheme you want. I'm not a game designer, but I am a software developer and have worked on programs with user interfaces. Unless there's a really compelling reason from a design perspective to tie the user to D-pad controls, it's never a good idea to force a control scheme on users that is artificially restrictive. (I generally feel the same way about forced stylus controls on DS games; I played Zelda and Starfox Command on the DS, but I never liked the controls at all. They're a pain.)
My understanding is that Team Ninja wanted to have other control options; Sakamoto is the one pushing for the D-pad only controls. Therein lies something frustrating about Nintendo; they offer machines with a lot of different control options, but they never use them all to their full potential.
I have it preordered now simply because it's got the $20 credit-bonus deal going on at Amazon. That credit will be going towards DKC or Kirby later this year. It also happens to be near my birthday, and I'll probably get some cash to cover the expense. Otherwise, I'd probably pass for a few months.