Erm, the controller is just a traditional controller with a touchscreen, this doesn't radically change gameplay, and you just cherry-picked two titles with one not even released yet.
Nobody's interested in it because it had a horrible launch and has no games, E3 will focus on Nintendo's biggest titles.
I agree that, WiiU controller is a lot more mainstream than Wiimote.
The problem is that you can't use more than two WiiU controllers.
Aside that, I can see many games forcing you to using these motion gimmicks just like Wii.
There was no need in using motion for NSMBW or DKCR, and, at least for me, these features are annoying as fuck.
I don't see what makes you think the Wii U is struggling in terms of hardware, and I don't think naive is the right word.
Here is a chart with the known specs so far:
http://www.ign.com/wikis/xbox-one/PS4_vs._Xbox_One_vs._Wii_U_Comparison_Chart
With E3 we will probably know a lot more about X1 and PS4 specs, but so far, WiiU seems far behind in terms of hardware.