Do third party games not sell well? Well Bayo 2 is at nearly 600K (with digital sales probably a bit above), Hyrule Warriors is one of the best selling Warriors games of all time, Rayman Legends sold around the same as the other 2 consoles (less than Bayo 2 I might add) on Wii U.
Or are we talking about COD or other 3rd party games that were half assed and known not to have DLC, parts of the game included on other versions, or special editions. No, those don't sell well on the Wii U.
As for new Nintendo IPs we have Wonderful 101, Xenoblade (I know X is the second one, but come on it's still pretty fresh due to most of us not seeing XC until 2011/2012), and Splatoon. Not to mention Project Guard and Project Giant Robo.
A few of your points seem to be a bit off.