I mean sure, the Wii U had set of excellent games. Most 1st party. And we know the Switch will get it's share as well.
But as someone feeling slightly burnt by the short lifetime and narrow library of the Wii U, how can anyone say with any certainty that the Switch will be any different?
How certain can you be that 3-4 years from now we won't have another 1 game year from Nintendo. Look at Wii U 2016 library.
Color me skeptical.
A very narrow library on WiiU, true, but I'm optimistic about Switch, because:
Upgraded ports: this means the games have a short development time and free the teams creating them to do another version. It also helps they don't need to develop a portable version of that game:
Mario Kart
Splatoon
Mario Maker
Smash Bros
Zelda: Not really an upgraded port, since it's releasing first on Switch, but you know what I mean.
Major games:
3D Mario: Seems very far in production, and I trust anything done by that team, they will have time for another big game, and hopefully a small one like Captain Todd.
Xenoblade: It was being done in parallel to X, with the original team, so it must be far along and will probably be awesome (please don't enter development hell).
So they are getting all the big games they MUST do out of the way early, and this leaves them time to explore new games. Mario Kart team doesn't need to do Mario Kart again, because they built a MK platform out of MK8, same with the others.
The other teams:
Mario Party team is gonna Mario Party.
Animal Crossing team is gonna Animal Crossing and Amiibo, and probably a mobile game.
Retro is working on something, probably not Metroid or DK.
Then there are the portable games teams (Intelligent systems, Arzest, NST, etc), ; I think all wrapping up the 3DS and working to release games with the launch of an unannounced NX portable device; hopefully the games will be cross compatible, so they don't waste efforts making two versions of everything.