How about at $200-$250, more Wiimote controls, and no gamepad? Would it still have failed due to lack of power?
It remains the software question. If Nintendo out of the box supported it with nice software, especially something like Wii Sports Resorts, things might have been different. But a lot of things indicate that Nintendo struggled getting in HD-development (something that struck also XBox360 and PS3 in the beginning) and had also too much resources into 3DS-development. So the main problem may have remained.
Restructuring the development helped. Also Switchs good launch year was helped a lot by completely neglecting the WiiU a yearor so before.