I am sour however that the Wii Remotes are not working with the Switch though, as I find the Wii Wheel to be a superior experience when playing Mario Kart. There is no technical reason for this as far as I can tell as the Switch still uses Bluetooth for connectivity. Now, there are new wheels, but just like the Joy-Cons, they are far too small to be comfortable given the size of my hands.
Specifically: I want to add direct support for proper e-drums played via MIDI into Dolphin, without the various hacks to get it to emulate a keyboard etc, and compatible even with the Pro Drums mode in RB3.
Guitars are simultaneously an easier and harder question: would require a DIY guitar, but can be fed into Dolphin just by emulating a HID device.
email is in my bio if you want to discuss