This topic has always interested me. I am a Nintendo fan as a whole, but they do not listen to their fan base. Wii controls felt like I needed to heavily exaggerate motions. Bowling is fun and all, but skyward sword was ruined to me. It could be because I was holding the wiimote and joystick in opposite hands, as a friend noticed me doing.
But about marketing. As mentioned above, they go for gimmicks. This might surprise you:
https://en.wikipedia.org/wiki/List_of_best-selling_game_consoles
The marketing for the launch was actually genius. They broke the age gap to lure in the elderly and young kids by showing an interactive device with E for everyone games. As a parent at that time, what console would you by for your kids? So now you have a bigger audience that Microsoft and Sony totally missed.
Now, while they had that audience, they didn't deliver on it. Again, only E for everyone gaming does hit core gamers as a childish system. Nintendo also killed 3rd party support by having such a strange device that didn't have the power or resources other machines had; a big one being hdmi. Could you imagine trying to map controls on one of the several different strange controller configurations?
So, when the wiiu came out, many people seemed turned off. For one, having the name of a previous system embedded into your next one when people were burned out on the previous gimmick is not smart marketing. We didn't want another wii, we wanted something new, (although I guess SNES and NES name comparison may contradict that). Which it was for the most part. Yet, the same problems persisted, without a successful launch.
So here we are with the switch... Being optimistic would probably lead me to disappointment. Someday, Nintendo's flaws will catch up to them. This company has huge brand recognition. Imagine how big Nintendo would be if you could play COD online on a clean system with a comfortable and
practical controller and fire up a Zelda game or Smash brothers on the same system?
*Sigh* maybe someday