That IS the best controller design I've ever heard. Thats enough buttons for anything! And the D-Stick IMO is the best of both worlds. It would be nice if GP didn't come up with any weird buttons.
What they should do is re-use the GP D-stick L,R,Start, Select, A & B buttons then make C,X,Y & Z buttons which are just like the GP A&B buttons but with different letters stamped in.
I guess I'm only excited because I've never seen a Saturn controller until now.
EDIT: Now all they have to do is make it powerful enough to emulate all the stuff that uses that many buttons.
Just think how fun:
Genesis
Saturn
SNES
DC (Probably could'nt emulate that)
Ps1 (Ps2 uses the same controller, but I doubt we could emulate that. Ps1's viable though)
GC (I don't think we could emulate that either)
...could be.
Suprise me Gamepark!