Ubisoft has been Nintendo's most consistent third party supporter since it began using more underpowered hardware with the Wii, and even they jumped ship as soon as they could with the Wii U. Zombie U was to the Wii U what Red Steel was to the Wii, a mature FPS at launch which showed off what makes the console unique - except it wasn't broken like that Wii game was. They kept their promise to bring Watch Dogs to the Wii U and the port when it finally came over wasn't bad. They brought over Splinter Cell as well as 2 Assassin's Creed games, Child of Light, and the Just Dance games. But even they realized the Wii U was a sinking ship which is why they delayed Rayman Legends just so they could release it at the same time on PS and XB. I actually think that was a dumb move, because if they had released it in early 2013 it would have been the only thing available for Wii U owners, whereas by releasing it so much later it had to compete with with a library which now included Super Mario 3D World and Sonic Lost World on the immediate horizon, as well as the vast libraries of the other platforms.
Trine 2 and Need for Speed Most Wanted were rare 3rd party ports where they put in the effort to take advantage of the Wii U's more powerful GPU and additional RAM to make the games look better than the PS360 counterparts. It's not that often you see EA put that much effort into anything these days.
The difference in third party support between Wii U and Switch can be seen in the fact that porting to Switch is practically an industry in and unto itself, with multiple studios like Panic Button making names for themselves specifically in porting the games of other studios to the Switch and getting them to run well. Imagine if there were studios like that for the Wii instead of developers having to have a separate team split off to make an entirely different version for the Wii.







