The Wii U library is lacking even on the first party department imo.
No Animal Crossing. No traditional Kirby game. No Fire Emblem. No Metroid. Then there's the mediocre/bad games: Star Fox Zero, Mario Tennis Ultra Smash, the unecessary Wii Sports Club...
It's an OK library when we look at it considering it was from a failed console but at the end of the day the Wii had more variety and a steady flow of games, at least for a while. The Wii U had severe software droughts during its life, and it all started mere months after it launched.