I tend to agree, but it's too late to really change it now.
Even the "off-TV" play for me is kinda pointless, you have to be sitting in the same room, so why even bother playing on a low-res crappy little LCD display when you've waited 6 years for Nintendo to finally have an HD console and can play in HD resolution.
Unlike this imaginary world that Nintendo lives in, most people have multiple TVs in their homes too, so the whole "OMG! I want to watch my TV show, turn off the video games" is kind of a moot concern.
Most games just use the Wii U screen as a map/inventory screen, which is boring and dull. It was a horrible idea to base an entire console around this idea, and the sales figures reflect that.
The coolest part about the second screen for me is being able to browse Youtube videos and then wirelessly sync them to the TV, but that's something that gets used maybe once every two weeks or something for me.
They made the console basically for the Japanese market IMO, but the Japanese market doesn't care about home consoles period, so basically it's a system made for no market.
