This might surprise some a bit, but I'm sure a lot of people think the launch year lineup is better than the combine output of the Wii U and 3DS's first year.
The real question is how is a casual who owned either the Wii or 3DS but didn't buy the Wii U view the console. In terms of the Wii U it's pretty much the most hardcore Nintendo console because only hardcore Nintendo fans bought it.
A person who didn't own the Wii U isn't going to care Zelda is available on the system or that MK8D is a port. You have pretty much two of the biggest games that could launch on a system releasing back to back months, a new IP in the summer(a few years ago people were complaining about lack of new IPs), the sequel to the best selling console game in Japan this gen Splatoon and a new Mario, Xeno 2 in the fall. If you are person who buys Nintendo consoles or Nintendo handhelds for the 1st party games but didn't buy the Wii U it's a very nice lineup.
How would a person who for example bought a 2DS last Christmas due to Pokemon Go look at the device - having never owned a Nintendo console before. Does he look at the lineup and say - yes that's a good value for x4 the amount I paid for the 2DS or does he need Pokemon Stars and a few more games to be announced to seal the deal.
Switch's major issue to most people on GAF in terms of lineup is the fact that it isn't launching with a bunch of major games. To me it's natural from a marketing perspective, you need short term focus and although there are videos and marketing for the other titles - there is no doubt that Zelda is the major focus in the West for the launch. MK8D is not really being pushed right now but Nintendo will be marketing the hell out of it late March/April. Splatoon 2 is already front and center because it's the system seller in Japan and globaltestfires, WW tournaments, concerts and events are going to fuel marketing there culminating in it's release. Arms will get it's spot under the headlights ahead of it's release. The real question is what fills the gaps because I definitely think Nintendo would want to release a major game every month/month and half during the first year of the system.
Also major third party support will come from the West only if the Switch is successful, Japanese 3rd Party support is already beginning to ramp up but I don't expect anything major to be announced in that regard until early summer.