Yeah i agree.

And i want Mario Maker on 3DS too, even just a version to play levels without a create mode.

Motion controls would be worse I think, since you have to move the whole screen.

Would have been just as bad.

Visually would have been the same I suppose..

*dudu chuu*

You could have the two perspectives on each screen, yes, but the motion controls wouldn't work at all because you need to move the two screens separately from one another. If there was a Star Fox game on the 3DS, it would definitiely not be Star Fox Zero.

Controls wouldn't really work well with the 3DS, but I'm sure the 3DS wouldn't be powerful enough for the game even with the visuals being lowered

Change it to a kid icarus-esque control and it should work better than it does right now on the Wii U.