They were too focused on that crappy mobile version to make a Switch exclusive Mario Kart proper. Nintendo needed a popular multiplayer game on Switch ASAP to help move units so the port of MK8 made sense. Now, they're focusing on churning out more exclusives. Personally, I'd rather see their resources go to things like a new F-Zero, Pikmin, Zelda, Star Fox, Metroid, etc.. than to another Mario Kart. I think will come eventually, although it may not be for the Switch but for upcoming New Switch XL or Switch U.
If they made a new Mario Kart, it would be great to see all courses available. Customizing circuits by selecting the courses you want and how many courses would be neat. They could add a feature where you fise courses together (i.e. 1st lap is a lap on Mario Circuit, 2nd lap is a lap on Bowsers Castle, 3rd lap is a lap on Rainbow Roas with seamless transitions).
The Switch Lite name isn't bad. The DS Lite brand sold like hotcakes so it makes sense. Gameboy Light, DS Lite, Switch Lite. Better than the Wii U name and all the 3DS naming fails.
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WTB:
Mega Man X2 box & manual
Mega Man X3 manual
Zelda 2 Trash Can