I agree, there is no need for wiimote and classic controllers support.
As you can use any other USB controller.
I got my PS3 controller working (sixaxis) when using the controller.ini from the git repository.
Also I was confused when I first started modding my Wii-u, as there is no GC port or mem card port.
The only other option is using devolution, but you need the original disc to verify the games. But you can use the classic controller with devolution.
Nintendont is the best alternative, if you don't have the original discs anymore.
Still DIOS-MIOS might be the most compatible option, although there is no way to use on the newer wii's and wii-u, because of lack GC ports.
Is it possible to use DIOS-MIOS with a GC controller + USB adapter on Wii-U?
And it has memory card emulation.
So if you can get a GC controller + USB adapter will it work on Wii-U?